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 System Interface for RTEMS. |
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16 | */ |
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17 | |
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18 | #if HAVE_CONFIG_H |
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19 | #include "config.h" |
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20 | #endif |
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21 | |
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22 | #include <inttypes.h> |
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23 | #include <stdlib.h> |
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24 | |
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25 | #if SIZEOF_MODE_T == 8 |
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26 | #define PRIomode_t PRIo64 |
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27 | #elif SIZEOF_MODE_T == 4 |
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28 | #define PRIomode_t PRIo32 |
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29 | #else |
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30 | #error "unsupport size of mode_t" |
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31 | #endif |
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32 | |
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33 | #include <rtems/rfs/rtems-rfs-file.h> |
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34 | #include <rtems/rfs/rtems-rfs-dir.h> |
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35 | #include <rtems/rfs/rtems-rfs-link.h> |
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36 | #include "rtems-rfs-rtems.h" |
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37 | |
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38 | /** |
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39 | * The libio permissions for read/execute. |
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40 | */ |
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41 | #define RTEMS_LIBIO_PERMS_RX (RTEMS_LIBIO_PERMS_SEARCH | RTEMS_LIBIO_PERMS_READ) |
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42 | /** |
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43 | * The libio permissions for write/execute. |
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44 | */ |
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45 | #define RTEMS_LIBIO_PERMS_WX (RTEMS_LIBIO_PERMS_SEARCH | RTEMS_LIBIO_PERMS_WRITE) |
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46 | |
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47 | /** |
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48 | * Evaluate the path to a node that wishes to be accessed. The pathloc is |
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49 | * returned with the ino to the node to be accessed. |
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50 | * |
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51 | * The routine starts from the root stripping away any leading path separators |
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52 | * breaking the path up into the node names and checking an inode exists for |
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53 | * that node name. Permissions are checked to insure access to the node is |
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54 | * allowed. A path to a node must be accessable all the way even if the end |
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55 | * result is directly accessable. As a user on Linux try "ls /root/../tmp" and |
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56 | * you will see if fails. |
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57 | * |
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58 | * The whole process is complicated by crossmount paths where we head down into |
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59 | * this file system only to return to the top and out to a another mounted file |
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60 | * system. For example we are mounted on '/e' and the user enters "ls |
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61 | * /e/a/b/../../dev". We need to head down then back up. |
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62 | * |
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63 | * @param path |
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64 | * @param pathlen |
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65 | * @param flags |
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66 | * @param pathloc |
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67 | */ |
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68 | int |
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69 | rtems_rfs_rtems_eval_path (const char* path, |
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70 | size_t pathlen, |
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71 | int flags, |
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72 | rtems_filesystem_location_info_t* pathloc) |
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73 | { |
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74 | rtems_rfs_file_system* fs = rtems_rfs_rtems_pathloc_dev (pathloc); |
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75 | rtems_rfs_inode_handle inode; |
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76 | rtems_rfs_ino ino = rtems_rfs_rtems_get_pathloc_ino (pathloc); |
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77 | uint32_t doff = 0; |
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78 | const char* node; |
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79 | size_t node_len; |
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80 | int stripped; |
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81 | int rc; |
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82 | |
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83 | if (rtems_rfs_rtems_trace (RTEMS_RFS_RTEMS_DEBUG_EVAL_PATH)) |
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84 | printf ("rtems-rfs-rtems: eval-path: in: path:%s pathlen:%zi ino:%" PRId32 "\n", |
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85 | path, pathlen, ino); |
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86 | |
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87 | /* |
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88 | * Eat any separators at the start of the path. |
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89 | */ |
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90 | stripped = rtems_filesystem_prefix_separators (path, pathlen); |
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91 | path += stripped; |
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92 | pathlen -= stripped; |
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93 | |
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94 | rtems_rfs_rtems_lock (fs); |
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95 | |
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96 | while (true) |
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97 | { |
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98 | /* |
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99 | * Open and load the inode. |
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100 | */ |
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101 | rc = rtems_rfs_inode_open (fs, ino, &inode, true); |
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102 | if (rc > 0) |
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103 | { |
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104 | rtems_rfs_rtems_unlock (fs); |
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105 | return rtems_rfs_rtems_error ("eval_path: opening inode", rc); |
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106 | } |
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107 | |
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108 | /* |
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109 | * Is this the end of the pathname we where given ? |
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110 | */ |
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111 | if ((*path == '\0') || (pathlen == 0)) |
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112 | break; |
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113 | |
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114 | /* |
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115 | * If a directory the execute bit must be set for us to enter. |
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116 | */ |
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117 | if (RTEMS_RFS_S_ISDIR (rtems_rfs_inode_get_mode (&inode)) && |
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118 | !rtems_rfs_rtems_eval_perms (&inode, RTEMS_LIBIO_PERMS_SEARCH)) |
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119 | { |
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120 | rtems_rfs_inode_close (fs, &inode); |
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121 | rtems_rfs_rtems_unlock (fs); |
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122 | return rtems_rfs_rtems_error ("eval_path: eval perms", EACCES); |
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123 | } |
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124 | |
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125 | /* |
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126 | * Extract the node name we will look for this time around. |
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127 | */ |
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128 | node = path; |
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129 | node_len = 0; |
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130 | while (!rtems_filesystem_is_separator (*path) && |
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131 | (*path != '\0') && pathlen && |
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132 | ((node_len + 1) < rtems_rfs_fs_max_name (fs))) |
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133 | { |
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134 | path++; |
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135 | pathlen--; |
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136 | node_len++; |
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137 | } |
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138 | |
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139 | /* |
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140 | * Eat any separators at start of the path. |
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141 | */ |
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142 | stripped = rtems_filesystem_prefix_separators (path, pathlen); |
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143 | path += stripped; |
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144 | pathlen -= stripped; |
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145 | node_len += stripped; |
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146 | |
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147 | /* |
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148 | * If the node is the current directory and there is more path to come move |
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149 | * on it else we are at the inode we want. |
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150 | */ |
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151 | if (rtems_rfs_current_dir (node)) |
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152 | { |
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153 | if (*path) |
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154 | continue; |
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155 | break; |
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156 | } |
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157 | |
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158 | /* |
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159 | * If the node is a parent we must move up one directory. If the location |
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160 | * is on another file system we have a crossmount so we call that file |
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161 | * system to handle the remainder of the path. |
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162 | */ |
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163 | if (rtems_rfs_parent_dir (node)) |
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164 | { |
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165 | /* |
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166 | * If we are at root inode of the file system we have a crossmount path. |
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167 | */ |
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168 | if (ino == RTEMS_RFS_ROOT_INO) |
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169 | { |
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170 | if (rtems_rfs_rtems_trace (RTEMS_RFS_RTEMS_DEBUG_EVAL_PATH)) |
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171 | printf("rtems-rfs-rtems: eval-path: crossmount: path:%s (%zd)\n", |
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172 | path - node_len, pathlen + node_len); |
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173 | rtems_rfs_inode_close (fs, &inode); |
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174 | rtems_rfs_rtems_unlock (fs); |
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175 | *pathloc = pathloc->mt_entry->mt_point_node; |
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176 | return (*pathloc->ops->evalpath_h)(path - node_len, pathlen + node_len, |
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177 | flags, pathloc); |
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178 | } |
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179 | |
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180 | /* |
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181 | * We need to find the parent of this node. |
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182 | */ |
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183 | rc = rtems_rfs_dir_lookup_ino (fs, &inode, "..", 2, &ino, &doff); |
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184 | if (rc > 0) |
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185 | { |
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186 | rtems_rfs_inode_close (fs, &inode); |
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187 | rtems_rfs_rtems_unlock (fs); |
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188 | return rtems_rfs_rtems_error ("eval_path: read parent inode", rc); |
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189 | } |
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190 | if (rtems_rfs_rtems_trace (RTEMS_RFS_RTEMS_DEBUG_EVAL_PATH)) |
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191 | printf("rtems-rfs-rtems: eval-path: parent: ino:%" PRId32 "\n", ino); |
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192 | } |
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193 | else |
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194 | { |
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195 | /* |
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196 | * Look up the node name in this directory. If found drop through, close |
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197 | * the current inode and let the loop open the inode so the mode can be |
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198 | * read and handlers set. |
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199 | */ |
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200 | rc = rtems_rfs_dir_lookup_ino (fs, &inode, |
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201 | node, node_len - stripped, &ino, &doff); |
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202 | if (rc > 0) |
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203 | { |
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204 | rtems_rfs_inode_close (fs, &inode); |
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205 | rtems_rfs_rtems_unlock (fs); |
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206 | return ((errno = rc) == 0) ? 0 : -1; |
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207 | } |
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208 | if (rtems_rfs_rtems_trace (RTEMS_RFS_RTEMS_DEBUG_EVAL_PATH)) |
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209 | printf("rtems-rfs-rtems: eval-path: down: path:%s ino:%" PRId32 "\n", node, ino); |
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210 | } |
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211 | |
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212 | rc = rtems_rfs_inode_close (fs, &inode); |
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213 | if (rc > 0) |
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214 | { |
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215 | rtems_rfs_inode_close (fs, &inode); |
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216 | rtems_rfs_rtems_unlock (fs); |
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217 | return rtems_rfs_rtems_error ("eval_path: closing node", rc); |
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218 | } |
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219 | } |
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220 | |
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221 | rtems_rfs_rtems_set_pathloc_ino (pathloc, ino); |
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222 | rtems_rfs_rtems_set_pathloc_doff (pathloc, doff); |
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223 | |
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224 | rc = rtems_rfs_rtems_set_handlers (pathloc, &inode) ? 0 : EIO; |
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225 | |
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226 | rtems_rfs_inode_close (fs, &inode); |
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227 | rtems_rfs_rtems_unlock (fs); |
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228 | |
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229 | if (rtems_rfs_rtems_trace (RTEMS_RFS_RTEMS_DEBUG_EVAL_PATH)) |
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230 | printf("rtems-rfs-rtems: eval-path: ino:%" PRId32 "\n", ino); |
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231 | |
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232 | return rc; |
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233 | } |
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234 | |
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235 | /** |
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236 | * The following routine evaluates a path for a new node to be created. The |
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237 | * pathloc is returned with a pointer to the parent of the new node. The name |
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238 | * is returned with a pointer to the first character in the new node name. The |
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239 | * parent node is verified to be a directory. |
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240 | * |
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241 | * @param path |
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242 | * @param pathloc |
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243 | * @param name |
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244 | * @return int |
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245 | */ |
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246 | int |
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247 | rtems_rfs_rtems_eval_for_make (const char* path, |
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248 | rtems_filesystem_location_info_t* pathloc, |
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249 | const char** name) |
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250 | { |
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251 | rtems_rfs_file_system* fs = rtems_rfs_rtems_pathloc_dev (pathloc); |
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252 | rtems_rfs_inode_handle inode; |
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253 | rtems_rfs_ino ino = rtems_rfs_rtems_get_pathloc_ino (pathloc); |
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254 | rtems_rfs_ino node_ino; |
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255 | uint32_t doff = 0; |
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256 | const char* node; |
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257 | int node_len; |
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258 | int stripped; |
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259 | int rc; |
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260 | |
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261 | if (rtems_rfs_rtems_trace (RTEMS_RFS_RTEMS_DEBUG_EVAL_FOR_MAKE)) |
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262 | printf ("rtems-rfs-rtems: eval-for-make: path:%s ino:%" PRId32 "\n", path, ino); |
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263 | |
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264 | *name = path + strlen (path); |
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265 | |
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266 | while (*name != path) |
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267 | { |
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268 | (*name)--; |
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269 | if (rtems_filesystem_is_separator (**name)) |
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270 | { |
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271 | (*name)++; |
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272 | break; |
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273 | } |
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274 | } |
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275 | |
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276 | /* |
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277 | * Eat any separators at start of the path. |
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278 | */ |
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279 | stripped = rtems_filesystem_prefix_separators (path, strlen(path)); |
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280 | path += stripped; |
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281 | |
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282 | rtems_rfs_rtems_lock (fs); |
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283 | |
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284 | while (true) |
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285 | { |
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286 | /* |
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287 | * Open and load the inode. |
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288 | */ |
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289 | rc = rtems_rfs_inode_open (fs, ino, &inode, true); |
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290 | if (rc > 0) |
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291 | { |
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292 | rtems_rfs_rtems_unlock (fs); |
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293 | return rtems_rfs_rtems_error ("eval_for_make: read ino", rc); |
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294 | } |
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295 | |
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296 | /* |
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297 | * If a directory the execute bit must be set for us to enter. |
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298 | */ |
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299 | if (RTEMS_RFS_S_ISDIR (rtems_rfs_inode_get_mode (&inode)) && |
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300 | !rtems_rfs_rtems_eval_perms (&inode, RTEMS_LIBIO_PERMS_SEARCH)) |
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301 | { |
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302 | rtems_rfs_inode_close (fs, &inode); |
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303 | rtems_rfs_rtems_unlock (fs); |
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304 | return rtems_rfs_rtems_error ("eval_for_make: eval perms", EACCES); |
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305 | } |
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306 | |
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307 | /* |
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308 | * Is this the end of the pathname we where given ? |
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309 | */ |
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310 | if (path == *name) |
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311 | break; |
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312 | |
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313 | /* |
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314 | * Extract the node name we will look for this time around. |
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315 | */ |
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316 | node = path; |
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317 | node_len = 0; |
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318 | while (!rtems_filesystem_is_separator(*path) && |
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319 | (*path != '\0') && |
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320 | (node_len < (rtems_rfs_fs_max_name (fs) - 1))) |
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321 | { |
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322 | node_len++; |
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323 | path++; |
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324 | } |
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325 | |
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326 | /* |
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327 | * Eat any separators at start of the new path. |
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328 | */ |
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329 | stripped = rtems_filesystem_prefix_separators (path, strlen (path)); |
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330 | path += stripped; |
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331 | node_len += stripped; |
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332 | |
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333 | /* |
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334 | * If the node is the current directory and there is more path to come move |
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335 | * on it else we are at the inode we want. |
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336 | */ |
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337 | if (rtems_rfs_current_dir (node)) |
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338 | { |
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339 | if (*path) |
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340 | continue; |
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341 | break; |
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342 | } |
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343 | |
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344 | /* |
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345 | * If the node is a parent we must move up one directory. If the location |
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346 | * is on another file system we have a crossmount so we call that file |
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347 | * system to handle the remainder of the path. |
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348 | */ |
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349 | if (rtems_rfs_parent_dir (path)) |
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350 | { |
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351 | /* |
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352 | * If we are at the root inode of the file system we have a crossmount |
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353 | * path. |
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354 | */ |
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355 | if (ino == RTEMS_RFS_ROOT_INO) |
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356 | { |
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357 | if (rtems_rfs_rtems_trace (RTEMS_RFS_RTEMS_DEBUG_EVAL_FOR_MAKE)) |
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358 | printf("rtems-rfs-rtems: eval-for-make: crossmount: path:%s\n", |
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359 | path - node_len); |
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360 | |
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361 | rtems_rfs_inode_close (fs, &inode); |
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362 | rtems_rfs_rtems_unlock (fs); |
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363 | *pathloc = pathloc->mt_entry->mt_point_node; |
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364 | return (*pathloc->ops->evalformake_h)(path - node_len, pathloc, name); |
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365 | } |
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366 | |
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367 | /* |
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368 | * If not a directory give and up return. We cannot change dir from a |
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369 | * regular file or device node. |
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370 | */ |
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371 | if (!RTEMS_RFS_S_ISDIR (rtems_rfs_inode_get_mode (&inode))) |
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372 | { |
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373 | rtems_rfs_inode_close (fs, &inode); |
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374 | rtems_rfs_rtems_unlock (fs); |
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375 | return rtems_rfs_rtems_error ("eval_for_make: not dir", ENOTSUP); |
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376 | } |
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377 | |
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378 | /* |
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379 | * We need to find the parent of this node. |
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380 | */ |
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381 | rc = rtems_rfs_dir_lookup_ino (fs, &inode, "..", 2, &ino, &doff); |
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382 | if (rc > 0) |
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383 | { |
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384 | rtems_rfs_inode_close (fs, &inode); |
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385 | rtems_rfs_rtems_unlock (fs); |
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386 | return rtems_rfs_rtems_error ("eval_for_make: read parent inode", rc); |
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387 | } |
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388 | if (rtems_rfs_rtems_trace (RTEMS_RFS_RTEMS_DEBUG_EVAL_FOR_MAKE)) |
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389 | printf ("rtems-rfs-rtems: eval-for-make: parent: ino:%" PRId32 "\n", ino); |
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390 | } |
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391 | else |
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392 | { |
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393 | /* |
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394 | * Read the inode so we know it exists and what type it is. |
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395 | */ |
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396 | rc = rtems_rfs_dir_lookup_ino (fs, &inode, |
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397 | node, node_len - stripped, &ino, &doff); |
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398 | if (rc > 0) |
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399 | { |
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400 | rtems_rfs_inode_close (fs, &inode); |
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401 | rtems_rfs_rtems_unlock (fs); |
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402 | return rtems_rfs_rtems_error ("eval_for_make: reading inode", rc); |
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403 | } |
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404 | if (rtems_rfs_rtems_trace (RTEMS_RFS_RTEMS_DEBUG_EVAL_FOR_MAKE)) |
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405 | printf("rtems-rfs-rtems: eval-for-make: down: path:%s ino:%" PRId32 "\n", |
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406 | node, ino); |
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407 | } |
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408 | |
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409 | rc = rtems_rfs_inode_close (fs, &inode); |
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410 | if (rc > 0) |
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411 | { |
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412 | rtems_rfs_rtems_unlock (fs); |
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413 | return rtems_rfs_rtems_error ("eval_for_make: closing node", rc); |
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414 | } |
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415 | } |
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416 | |
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417 | if (!RTEMS_RFS_S_ISDIR (rtems_rfs_inode_get_mode (&inode))) |
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418 | { |
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419 | rtems_rfs_inode_close (fs, &inode); |
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420 | rtems_rfs_rtems_unlock (fs); |
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421 | return rtems_rfs_rtems_error ("eval_for_make: not dir", ENOTDIR); |
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422 | } |
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423 | |
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424 | if (!rtems_rfs_rtems_eval_perms (&inode, RTEMS_LIBIO_PERMS_WX)) |
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425 | { |
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426 | rtems_rfs_inode_close (fs, &inode); |
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427 | rtems_rfs_rtems_unlock (fs); |
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428 | return rtems_rfs_rtems_error ("eval_for_make: cannot write", EACCES); |
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429 | } |
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430 | |
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431 | /* |
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432 | * Make sure the name does not already exists in the directory. |
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433 | */ |
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434 | rc = rtems_rfs_dir_lookup_ino (fs, &inode, *name, strlen (*name), |
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435 | &node_ino, &doff); |
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436 | if (rc == 0) |
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437 | { |
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438 | rtems_rfs_inode_close (fs, &inode); |
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439 | rtems_rfs_rtems_unlock (fs); |
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440 | return rtems_rfs_rtems_error ("eval_for_make: found name", EEXIST); |
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441 | } |
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442 | |
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443 | if (rc != ENOENT) |
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444 | { |
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445 | rtems_rfs_inode_close (fs, &inode); |
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446 | rtems_rfs_rtems_unlock (fs); |
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447 | return rtems_rfs_rtems_error ("eval_for_make: look up", rc); |
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448 | } |
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449 | |
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450 | /* |
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451 | * Set the parent ino in the path location. |
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452 | */ |
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453 | |
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454 | rtems_rfs_rtems_set_pathloc_ino (pathloc, ino); |
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455 | rtems_rfs_rtems_set_pathloc_doff (pathloc, doff); |
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456 | |
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457 | rc = rtems_rfs_rtems_set_handlers (pathloc, &inode) ? 0 : EIO; |
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458 | |
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459 | if (rtems_rfs_rtems_trace (RTEMS_RFS_RTEMS_DEBUG_EVAL_FOR_MAKE)) |
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460 | printf("rtems-rfs-rtems: eval-for-make: parent ino:%" PRId32 " name:%s\n", |
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461 | ino, *name); |
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462 | |
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463 | rtems_rfs_inode_close (fs, &inode); |
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464 | rtems_rfs_rtems_unlock (fs); |
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465 | |
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466 | return rc; |
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467 | } |
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468 | |
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469 | /** |
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470 | * The following rouine creates a new link node under parent with the name |
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471 | * given in name. The link node is set to point to the node at to_loc. |
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472 | * |
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473 | * @param to_loc |
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474 | * @param parent_loc |
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475 | * @param name |
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476 | * @return int |
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477 | */ |
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478 | int |
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479 | rtems_rfs_rtems_link (rtems_filesystem_location_info_t* to_loc, |
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480 | rtems_filesystem_location_info_t* parent_loc, |
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481 | const char* name) |
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482 | { |
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483 | rtems_rfs_file_system* fs = rtems_rfs_rtems_pathloc_dev (to_loc); |
---|
484 | rtems_rfs_ino target = rtems_rfs_rtems_get_pathloc_ino (to_loc); |
---|
485 | rtems_rfs_ino parent = rtems_rfs_rtems_get_pathloc_ino (parent_loc); |
---|
486 | int rc; |
---|
487 | |
---|
488 | if (rtems_rfs_rtems_trace (RTEMS_RFS_RTEMS_DEBUG_LINK)) |
---|
489 | printf ("rtems-rfs-rtems: link: in: parent:%" PRId32 " target:%" PRId32 "\n", |
---|
490 | parent, target); |
---|
491 | |
---|
492 | rtems_rfs_rtems_lock (fs); |
---|
493 | |
---|
494 | rc = rtems_rfs_link (fs, name, strlen (name), parent, target, false); |
---|
495 | if (rc) |
---|
496 | { |
---|
497 | rtems_rfs_rtems_unlock (fs); |
---|
498 | return rtems_rfs_rtems_error ("link: linking", rc); |
---|
499 | } |
---|
500 | |
---|
501 | rtems_rfs_rtems_unlock (fs); |
---|
502 | |
---|
503 | return 0; |
---|
504 | } |
---|
505 | |
---|
506 | /** |
---|
507 | * Routine to remove a link node from the file system. |
---|
508 | * |
---|
509 | * @param parent_loc |
---|
510 | * @param loc |
---|
511 | * @return int |
---|
512 | */ |
---|
513 | |
---|
514 | int |
---|
515 | rtems_rfs_rtems_unlink (rtems_filesystem_location_info_t* parent_loc, |
---|
516 | rtems_filesystem_location_info_t* loc) |
---|
517 | { |
---|
518 | rtems_rfs_file_system* fs = rtems_rfs_rtems_pathloc_dev (parent_loc); |
---|
519 | rtems_rfs_ino parent = rtems_rfs_rtems_get_pathloc_ino (parent_loc); |
---|
520 | rtems_rfs_ino ino = rtems_rfs_rtems_get_pathloc_ino (loc); |
---|
521 | uint32_t doff = rtems_rfs_rtems_get_pathloc_doff (loc); |
---|
522 | int rc; |
---|
523 | |
---|
524 | rtems_rfs_rtems_lock (fs); |
---|
525 | |
---|
526 | if (rtems_rfs_rtems_trace (RTEMS_RFS_RTEMS_DEBUG_UNLINK)) |
---|
527 | printf("rtems-rfs-rtems: unlink: parent:%" PRId32 " doff:%" PRIu32 " ino:%" PRId32 "\n", |
---|
528 | parent, doff, ino); |
---|
529 | |
---|
530 | rc = rtems_rfs_unlink (fs, parent, ino, doff, rtems_rfs_unlink_dir_denied); |
---|
531 | if (rc) |
---|
532 | { |
---|
533 | rtems_rfs_rtems_unlock (fs); |
---|
534 | return rtems_rfs_rtems_error ("unlink: unlink inode", rc); |
---|
535 | } |
---|
536 | |
---|
537 | rtems_rfs_rtems_unlock (fs); |
---|
538 | |
---|
539 | return 0; |
---|
540 | } |
---|
541 | |
---|
542 | /** |
---|
543 | * The following verifies that and returns the type of node that the loc refers |
---|
544 | * to. |
---|
545 | * |
---|
546 | * @param pathloc |
---|
547 | * @return rtems_filesystem_node_types_t |
---|
548 | */ |
---|
549 | |
---|
550 | rtems_filesystem_node_types_t |
---|
551 | rtems_rfs_rtems_node_type (rtems_filesystem_location_info_t* pathloc) |
---|
552 | { |
---|
553 | rtems_rfs_file_system* fs = rtems_rfs_rtems_pathloc_dev (pathloc); |
---|
554 | rtems_rfs_ino ino = rtems_rfs_rtems_get_pathloc_ino (pathloc); |
---|
555 | rtems_filesystem_node_types_t type; |
---|
556 | rtems_rfs_inode_handle inode; |
---|
557 | uint16_t mode; |
---|
558 | int rc; |
---|
559 | |
---|
560 | rtems_rfs_rtems_lock (fs); |
---|
561 | |
---|
562 | rc = rtems_rfs_inode_open (fs, ino, &inode, true); |
---|
563 | if (rc > 0) |
---|
564 | { |
---|
565 | rtems_rfs_rtems_unlock (fs); |
---|
566 | return rtems_rfs_rtems_error ("node_type: opening inode", rc); |
---|
567 | } |
---|
568 | |
---|
569 | /* |
---|
570 | * Do not return RTEMS_FILESYSTEM_HARD_LINK because this would result in an |
---|
571 | * eval link which does not make sense in the case of the RFS file |
---|
572 | * system. All directory entries are links to an inode. A link such as a HARD |
---|
573 | * link is actually the normal path to a regular file, directory, device |
---|
574 | * etc's inode. Links to inodes can be considered "the real" one, yet they |
---|
575 | * are all links. |
---|
576 | */ |
---|
577 | mode = rtems_rfs_inode_get_mode (&inode); |
---|
578 | if (RTEMS_RFS_S_ISDIR (mode)) |
---|
579 | type = RTEMS_FILESYSTEM_DIRECTORY; |
---|
580 | else if (RTEMS_RFS_S_ISLNK (mode)) |
---|
581 | type = RTEMS_FILESYSTEM_SYM_LINK; |
---|
582 | else if (RTEMS_RFS_S_ISBLK (mode) || RTEMS_RFS_S_ISCHR (mode)) |
---|
583 | type = RTEMS_FILESYSTEM_DEVICE; |
---|
584 | else |
---|
585 | type = RTEMS_FILESYSTEM_MEMORY_FILE; |
---|
586 | |
---|
587 | rc = rtems_rfs_inode_close (fs, &inode); |
---|
588 | if (rc > 0) |
---|
589 | { |
---|
590 | rtems_rfs_rtems_unlock (fs); |
---|
591 | return rtems_rfs_rtems_error ("node_type: closing inode", rc); |
---|
592 | } |
---|
593 | |
---|
594 | rtems_rfs_rtems_unlock (fs); |
---|
595 | |
---|
596 | return type; |
---|
597 | } |
---|
598 | |
---|
599 | /** |
---|
600 | * This routine is the implementation of the chown() system call for the |
---|
601 | * RFS. |
---|
602 | * |
---|
603 | * @param pathloc |
---|
604 | * @param owner |
---|
605 | * @param group |
---|
606 | * return int |
---|
607 | */ |
---|
608 | |
---|
609 | static int |
---|
610 | rtems_rfs_rtems_chown (rtems_filesystem_location_info_t *pathloc, |
---|
611 | uid_t owner, |
---|
612 | gid_t group) |
---|
613 | { |
---|
614 | rtems_rfs_file_system* fs = rtems_rfs_rtems_pathloc_dev (pathloc); |
---|
615 | rtems_rfs_ino ino = rtems_rfs_rtems_get_pathloc_ino (pathloc); |
---|
616 | rtems_rfs_inode_handle inode; |
---|
617 | #if defined (RTEMS_POSIX_API) |
---|
618 | uid_t uid; |
---|
619 | #endif |
---|
620 | int rc; |
---|
621 | |
---|
622 | if (rtems_rfs_rtems_trace (RTEMS_RFS_RTEMS_DEBUG_CHOWN)) |
---|
623 | printf ("rtems-rfs-rtems: chown: in: ino:%" PRId32 " uid:%d gid:%d\n", |
---|
624 | ino, owner, group); |
---|
625 | |
---|
626 | rtems_rfs_rtems_lock (fs); |
---|
627 | |
---|
628 | rc = rtems_rfs_inode_open (fs, ino, &inode, true); |
---|
629 | if (rc > 0) |
---|
630 | { |
---|
631 | rtems_rfs_rtems_unlock (fs); |
---|
632 | return rtems_rfs_rtems_error ("chown: opening inode", rc); |
---|
633 | } |
---|
634 | |
---|
635 | /* |
---|
636 | * Verify I am the owner of the node or the super user. |
---|
637 | */ |
---|
638 | |
---|
639 | #if defined (RTEMS_POSIX_API) |
---|
640 | uid = geteuid(); |
---|
641 | |
---|
642 | if ((uid != rtems_rfs_inode_get_uid (&inode)) && (uid != 0)) |
---|
643 | { |
---|
644 | rtems_rfs_inode_close (fs, &inode); |
---|
645 | rtems_rfs_rtems_unlock (fs); |
---|
646 | return rtems_rfs_rtems_error ("chown: not able", EPERM); |
---|
647 | } |
---|
648 | #endif |
---|
649 | |
---|
650 | rtems_rfs_inode_set_uid_gid (&inode, owner, group); |
---|
651 | |
---|
652 | rc = rtems_rfs_inode_close (fs, &inode); |
---|
653 | if (rc) |
---|
654 | { |
---|
655 | rtems_rfs_rtems_unlock (fs); |
---|
656 | return rtems_rfs_rtems_error ("chown: closing inode", rc); |
---|
657 | } |
---|
658 | |
---|
659 | rtems_rfs_rtems_unlock (fs); |
---|
660 | |
---|
661 | return 0; |
---|
662 | } |
---|
663 | |
---|
664 | /** |
---|
665 | * This routine is the implementation of the utime() system call for the |
---|
666 | * RFS. |
---|
667 | * |
---|
668 | * @param pathloc |
---|
669 | * @param atime |
---|
670 | * @param mtime |
---|
671 | * return int |
---|
672 | */ |
---|
673 | |
---|
674 | int |
---|
675 | rtems_rfs_rtems_utime(rtems_filesystem_location_info_t* pathloc, |
---|
676 | time_t atime, |
---|
677 | time_t mtime) |
---|
678 | { |
---|
679 | rtems_rfs_file_system* fs = rtems_rfs_rtems_pathloc_dev (pathloc); |
---|
680 | rtems_rfs_ino ino = rtems_rfs_rtems_get_pathloc_ino (pathloc); |
---|
681 | rtems_rfs_inode_handle inode; |
---|
682 | int rc; |
---|
683 | |
---|
684 | rtems_rfs_rtems_lock (fs); |
---|
685 | |
---|
686 | rc = rtems_rfs_inode_open (fs, ino, &inode, true); |
---|
687 | if (rc) |
---|
688 | { |
---|
689 | rtems_rfs_rtems_unlock (fs); |
---|
690 | return rtems_rfs_rtems_error ("utime: read inode", rc); |
---|
691 | } |
---|
692 | |
---|
693 | rtems_rfs_inode_set_atime (&inode, atime); |
---|
694 | rtems_rfs_inode_set_mtime (&inode, mtime); |
---|
695 | |
---|
696 | rc = rtems_rfs_inode_close (fs, &inode); |
---|
697 | if (rc) |
---|
698 | { |
---|
699 | rtems_rfs_rtems_unlock (fs); |
---|
700 | return rtems_rfs_rtems_error ("utime: closing inode", rc); |
---|
701 | } |
---|
702 | |
---|
703 | rtems_rfs_rtems_unlock (fs); |
---|
704 | |
---|
705 | return 0; |
---|
706 | } |
---|
707 | |
---|
708 | /** |
---|
709 | * The following rouine creates a new symbolic link node under parent with the |
---|
710 | * name given in name. The node is set to point to the node at to_loc. |
---|
711 | * |
---|
712 | * @param parent_loc |
---|
713 | * @param link_name |
---|
714 | * @param node_name |
---|
715 | * return int |
---|
716 | */ |
---|
717 | |
---|
718 | int |
---|
719 | rtems_rfs_rtems_symlink (rtems_filesystem_location_info_t* parent_loc, |
---|
720 | const char* link_name, |
---|
721 | const char* node_name) |
---|
722 | { |
---|
723 | rtems_rfs_file_system* fs = rtems_rfs_rtems_pathloc_dev (parent_loc); |
---|
724 | rtems_rfs_ino parent = rtems_rfs_rtems_get_pathloc_ino (parent_loc); |
---|
725 | uid_t uid; |
---|
726 | gid_t gid; |
---|
727 | int rc; |
---|
728 | |
---|
729 | #if defined(RTEMS_POSIX_API) |
---|
730 | uid = geteuid (); |
---|
731 | gid = getegid (); |
---|
732 | #else |
---|
733 | uid = 0; |
---|
734 | gid = 0; |
---|
735 | #endif |
---|
736 | |
---|
737 | rtems_rfs_rtems_lock (fs); |
---|
738 | |
---|
739 | rc = rtems_rfs_symlink (fs, node_name, strlen (node_name), |
---|
740 | link_name, strlen (link_name), |
---|
741 | uid, gid, parent); |
---|
742 | if (rc) |
---|
743 | { |
---|
744 | rtems_rfs_rtems_unlock (fs); |
---|
745 | return rtems_rfs_rtems_error ("symlink: linking", rc); |
---|
746 | } |
---|
747 | |
---|
748 | rtems_rfs_rtems_unlock (fs); |
---|
749 | |
---|
750 | return 0; |
---|
751 | } |
---|
752 | |
---|
753 | /** |
---|
754 | * The following rouine puts the symblic links destination name into buf. |
---|
755 | * |
---|
756 | * @param loc |
---|
757 | * @param buf |
---|
758 | * @param bufsize |
---|
759 | * @return int |
---|
760 | */ |
---|
761 | |
---|
762 | ssize_t |
---|
763 | rtems_rfs_rtems_readlink (rtems_filesystem_location_info_t* pathloc, |
---|
764 | char* buf, |
---|
765 | size_t bufsize) |
---|
766 | { |
---|
767 | rtems_rfs_file_system* fs = rtems_rfs_rtems_pathloc_dev (pathloc); |
---|
768 | rtems_rfs_ino ino = rtems_rfs_rtems_get_pathloc_ino (pathloc); |
---|
769 | size_t length; |
---|
770 | int rc; |
---|
771 | |
---|
772 | if (rtems_rfs_rtems_trace (RTEMS_RFS_RTEMS_DEBUG_READLINK)) |
---|
773 | printf ("rtems-rfs-rtems: readlink: in: ino:%" PRId32 "\n", ino); |
---|
774 | |
---|
775 | rtems_rfs_rtems_lock (fs); |
---|
776 | |
---|
777 | rc = rtems_rfs_symlink_read (fs, ino, buf, bufsize, &length); |
---|
778 | if (rc) |
---|
779 | { |
---|
780 | rtems_rfs_rtems_unlock (fs); |
---|
781 | return rtems_rfs_rtems_error ("readlink: reading link", rc); |
---|
782 | } |
---|
783 | |
---|
784 | rtems_rfs_rtems_unlock (fs); |
---|
785 | |
---|
786 | return (int) length; |
---|
787 | } |
---|
788 | |
---|
789 | /** |
---|
790 | * File change mode routine. |
---|
791 | * |
---|
792 | * @param pathloc |
---|
793 | * @param mode |
---|
794 | * @return int |
---|
795 | */ |
---|
796 | int |
---|
797 | rtems_rfs_rtems_fchmod (rtems_filesystem_location_info_t* pathloc, |
---|
798 | mode_t mode) |
---|
799 | { |
---|
800 | rtems_rfs_file_system* fs = rtems_rfs_rtems_pathloc_dev (pathloc); |
---|
801 | rtems_rfs_ino ino = rtems_rfs_rtems_get_pathloc_ino (pathloc); |
---|
802 | rtems_rfs_inode_handle inode; |
---|
803 | uint16_t imode; |
---|
804 | #if defined (RTEMS_POSIX_API) |
---|
805 | uid_t uid; |
---|
806 | #endif |
---|
807 | int rc; |
---|
808 | |
---|
809 | if (rtems_rfs_rtems_trace (RTEMS_RFS_RTEMS_DEBUG_FCHMOD)) |
---|
810 | printf ("rtems-rfs-rtems: fchmod: in: ino:%" PRId32 " mode:%06" PRIomode_t "\n", |
---|
811 | ino, mode); |
---|
812 | |
---|
813 | rtems_rfs_rtems_lock (fs); |
---|
814 | |
---|
815 | rc = rtems_rfs_inode_open (fs, ino, &inode, true); |
---|
816 | if (rc) |
---|
817 | { |
---|
818 | rtems_rfs_rtems_unlock (fs); |
---|
819 | return rtems_rfs_rtems_error ("fchmod: opening inode", rc); |
---|
820 | } |
---|
821 | |
---|
822 | imode = rtems_rfs_inode_get_mode (&inode); |
---|
823 | |
---|
824 | /* |
---|
825 | * Verify I am the owner of the node or the super user. |
---|
826 | */ |
---|
827 | #if defined (RTEMS_POSIX_API) |
---|
828 | uid = geteuid(); |
---|
829 | |
---|
830 | if ((uid != rtems_rfs_inode_get_uid (&inode)) && (uid != 0)) |
---|
831 | { |
---|
832 | rtems_rfs_inode_close (fs, &inode); |
---|
833 | rtems_rfs_rtems_unlock (fs); |
---|
834 | return rtems_rfs_rtems_error ("fchmod: not owner", EPERM); |
---|
835 | } |
---|
836 | #endif |
---|
837 | |
---|
838 | imode &= ~(S_IRWXU | S_IRWXG | S_IRWXO | S_ISUID | S_ISGID | S_ISVTX); |
---|
839 | imode |= mode & (S_IRWXU | S_IRWXG | S_IRWXO | S_ISUID | S_ISGID | S_ISVTX); |
---|
840 | |
---|
841 | rtems_rfs_inode_set_mode (&inode, imode); |
---|
842 | |
---|
843 | rc = rtems_rfs_inode_close (fs, &inode); |
---|
844 | if (rc > 0) |
---|
845 | { |
---|
846 | rtems_rfs_rtems_unlock (fs); |
---|
847 | return rtems_rfs_rtems_error ("fchmod: closing inode", rc); |
---|
848 | } |
---|
849 | |
---|
850 | rtems_rfs_rtems_unlock (fs); |
---|
851 | |
---|
852 | return 0; |
---|
853 | } |
---|
854 | |
---|
855 | /** |
---|
856 | * The following routine does a stat on a node. |
---|
857 | * |
---|
858 | * @param pathloc |
---|
859 | * @param buf |
---|
860 | * @return int |
---|
861 | */ |
---|
862 | |
---|
863 | int |
---|
864 | rtems_rfs_rtems_stat (rtems_filesystem_location_info_t* pathloc, |
---|
865 | struct stat* buf) |
---|
866 | { |
---|
867 | rtems_rfs_file_system* fs = rtems_rfs_rtems_pathloc_dev (pathloc); |
---|
868 | rtems_rfs_ino ino = rtems_rfs_rtems_get_pathloc_ino (pathloc); |
---|
869 | rtems_rfs_inode_handle inode; |
---|
870 | rtems_rfs_file_shared* shared; |
---|
871 | uint16_t mode; |
---|
872 | int rc; |
---|
873 | |
---|
874 | if (rtems_rfs_rtems_trace (RTEMS_RFS_RTEMS_DEBUG_STAT)) |
---|
875 | printf ("rtems-rfs-rtems: stat: in: ino:%" PRId32 "\n", ino); |
---|
876 | |
---|
877 | rtems_rfs_rtems_lock (fs); |
---|
878 | |
---|
879 | rc = rtems_rfs_inode_open (fs, ino, &inode, true); |
---|
880 | if (rc) |
---|
881 | { |
---|
882 | rtems_rfs_rtems_unlock (fs); |
---|
883 | return rtems_rfs_rtems_error ("stat: opening inode", rc); |
---|
884 | } |
---|
885 | |
---|
886 | mode = rtems_rfs_inode_get_mode (&inode); |
---|
887 | |
---|
888 | if (RTEMS_RFS_S_ISCHR (mode) || RTEMS_RFS_S_ISBLK (mode)) |
---|
889 | { |
---|
890 | buf->st_rdev = |
---|
891 | rtems_filesystem_make_dev_t (rtems_rfs_inode_get_block (&inode, 0), |
---|
892 | rtems_rfs_inode_get_block (&inode, 1)); |
---|
893 | } |
---|
894 | |
---|
895 | buf->st_dev = rtems_rfs_fs_device (fs); |
---|
896 | buf->st_ino = ino; |
---|
897 | buf->st_mode = rtems_rfs_rtems_mode (mode); |
---|
898 | buf->st_nlink = rtems_rfs_inode_get_links (&inode); |
---|
899 | buf->st_uid = rtems_rfs_inode_get_uid (&inode); |
---|
900 | buf->st_gid = rtems_rfs_inode_get_gid (&inode); |
---|
901 | |
---|
902 | /* |
---|
903 | * Need to check is the ino is an open file. If so we take the values from |
---|
904 | * the open file rather than the inode. |
---|
905 | */ |
---|
906 | shared = rtems_rfs_file_get_shared (fs, ino); |
---|
907 | |
---|
908 | if (shared) |
---|
909 | { |
---|
910 | buf->st_atime = rtems_rfs_file_shared_get_atime (shared); |
---|
911 | buf->st_mtime = rtems_rfs_file_shared_get_mtime (shared); |
---|
912 | buf->st_ctime = rtems_rfs_file_shared_get_ctime (shared); |
---|
913 | buf->st_blocks = rtems_rfs_file_shared_get_block_count (shared); |
---|
914 | |
---|
915 | if (S_ISLNK (buf->st_mode)) |
---|
916 | buf->st_size = rtems_rfs_file_shared_get_block_offset (shared); |
---|
917 | else |
---|
918 | buf->st_size = rtems_rfs_file_shared_get_size (fs, shared); |
---|
919 | } |
---|
920 | else |
---|
921 | { |
---|
922 | buf->st_atime = rtems_rfs_inode_get_atime (&inode); |
---|
923 | buf->st_mtime = rtems_rfs_inode_get_mtime (&inode); |
---|
924 | buf->st_ctime = rtems_rfs_inode_get_ctime (&inode); |
---|
925 | buf->st_blocks = rtems_rfs_inode_get_block_count (&inode); |
---|
926 | |
---|
927 | if (S_ISLNK (buf->st_mode)) |
---|
928 | buf->st_size = rtems_rfs_inode_get_block_offset (&inode); |
---|
929 | else |
---|
930 | buf->st_size = rtems_rfs_inode_get_size (fs, &inode); |
---|
931 | } |
---|
932 | |
---|
933 | buf->st_blksize = rtems_rfs_fs_block_size (fs); |
---|
934 | |
---|
935 | rc = rtems_rfs_inode_close (fs, &inode); |
---|
936 | if (rc > 0) |
---|
937 | { |
---|
938 | rtems_rfs_rtems_unlock (fs); |
---|
939 | return rtems_rfs_rtems_error ("stat: closing inode", rc); |
---|
940 | } |
---|
941 | |
---|
942 | rtems_rfs_rtems_unlock (fs); |
---|
943 | return 0; |
---|
944 | } |
---|
945 | |
---|
946 | /** |
---|
947 | * Routine to create a node in the RFS file system. |
---|
948 | * |
---|
949 | * @param name |
---|
950 | * @param mode |
---|
951 | * @param dev |
---|
952 | * @param pathloc |
---|
953 | * @return int |
---|
954 | */ |
---|
955 | |
---|
956 | int |
---|
957 | rtems_rfs_rtems_mknod (const char *name, |
---|
958 | mode_t mode, |
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959 | dev_t dev, |
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960 | rtems_filesystem_location_info_t *pathloc) |
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961 | { |
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962 | rtems_rfs_file_system* fs = rtems_rfs_rtems_pathloc_dev (pathloc); |
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963 | rtems_rfs_ino parent = rtems_rfs_rtems_get_pathloc_ino (pathloc); |
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964 | rtems_rfs_ino ino; |
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965 | rtems_rfs_inode_handle inode; |
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966 | uid_t uid; |
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967 | gid_t gid; |
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968 | int rc; |
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969 | |
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970 | #if defined(RTEMS_POSIX_API) |
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971 | uid = geteuid (); |
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972 | gid = getegid (); |
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973 | #else |
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974 | uid = 0; |
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975 | gid = 0; |
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976 | #endif |
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977 | |
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978 | rtems_rfs_rtems_lock (fs); |
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979 | |
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980 | rc = rtems_rfs_inode_create (fs, parent, name, strlen (name), |
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981 | rtems_rfs_rtems_imode (mode), |
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982 | 1, uid, gid, &ino); |
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983 | if (rc > 0) |
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984 | { |
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985 | rtems_rfs_rtems_unlock (fs); |
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986 | return rtems_rfs_rtems_error ("mknod: inode create", rc); |
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987 | } |
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988 | |
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989 | rc = rtems_rfs_inode_open (fs, ino, &inode, true); |
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990 | if (rc > 0) |
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991 | { |
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992 | rtems_rfs_rtems_unlock (fs); |
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993 | return rtems_rfs_rtems_error ("mknod: inode open", rc); |
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994 | } |
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995 | |
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996 | if (S_ISDIR(mode) || S_ISREG(mode)) |
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997 | { |
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998 | } |
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999 | else if (S_ISCHR (mode) || S_ISBLK (mode)) |
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1000 | { |
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1001 | int major; |
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1002 | int minor; |
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1003 | rtems_filesystem_split_dev_t (dev, major, minor); |
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1004 | rtems_rfs_inode_set_block (&inode, 0, major); |
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1005 | rtems_rfs_inode_set_block (&inode, 1, minor); |
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1006 | } |
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1007 | else |
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1008 | { |
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1009 | rtems_rfs_inode_close (fs, &inode); |
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1010 | rtems_rfs_rtems_unlock (fs); |
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1011 | return rtems_rfs_rtems_error ("mknod: bad mode", EINVAL); |
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1012 | } |
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1013 | |
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1014 | rc = rtems_rfs_inode_close (fs, &inode); |
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1015 | if (rc > 0) |
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1016 | { |
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1017 | rtems_rfs_rtems_unlock (fs); |
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1018 | return rtems_rfs_rtems_error ("mknod: closing inode", rc); |
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1019 | } |
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1020 | |
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1021 | rtems_rfs_rtems_unlock (fs); |
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1022 | return 0; |
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1023 | } |
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1024 | |
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1025 | /** |
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1026 | * Routine to remove a node from the RFS file system. |
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1027 | * |
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1028 | * @param parent_pathloc |
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1029 | * @param pathloc |
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1030 | * @return int |
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1031 | */ |
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1032 | int |
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1033 | rtems_rfs_rtems_rmnod (rtems_filesystem_location_info_t* parent_pathloc, |
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1034 | rtems_filesystem_location_info_t* pathloc) |
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1035 | { |
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1036 | rtems_rfs_file_system* fs = rtems_rfs_rtems_pathloc_dev (pathloc); |
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1037 | rtems_rfs_ino parent = rtems_rfs_rtems_get_pathloc_ino (parent_pathloc); |
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1038 | rtems_rfs_ino ino = rtems_rfs_rtems_get_pathloc_ino (pathloc); |
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1039 | uint32_t doff = rtems_rfs_rtems_get_pathloc_doff (pathloc); |
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1040 | int rc; |
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1041 | |
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1042 | if (rtems_rfs_rtems_trace (RTEMS_RFS_RTEMS_DEBUG_RMNOD)) |
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1043 | printf ("rtems-rfs: rmnod: parent:%" PRId32 " doff:%" PRIu32 ", ino:%" PRId32 "\n", |
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1044 | parent, doff, ino); |
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1045 | |
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1046 | rtems_rfs_rtems_lock (fs); |
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1047 | |
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1048 | rc = rtems_rfs_unlink (fs, parent, ino, doff, rtems_rfs_unlink_dir_denied); |
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1049 | if (rc) |
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1050 | { |
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1051 | rtems_rfs_rtems_unlock (fs); |
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1052 | return rtems_rfs_rtems_error ("rmnod: unlinking", rc); |
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1053 | } |
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1054 | |
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1055 | rtems_rfs_rtems_unlock (fs); |
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1056 | return 0; |
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1057 | } |
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1058 | |
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1059 | /** |
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1060 | * The following routine does a sync on an inode node. Currently it flushes |
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1061 | * everything related to this device. |
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1062 | * |
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1063 | * @param iop |
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1064 | * @return int |
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1065 | */ |
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1066 | int |
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1067 | rtems_rfs_rtems_fdatasync (rtems_libio_t* iop) |
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1068 | { |
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1069 | int rc; |
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1070 | |
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1071 | rc = rtems_rfs_buffer_sync (rtems_rfs_rtems_pathloc_dev (&iop->pathinfo)); |
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1072 | if (rc) |
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1073 | return rtems_rfs_rtems_error ("fdatasync: sync", rc); |
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1074 | |
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1075 | return 0; |
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1076 | } |
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1077 | |
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1078 | /** |
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1079 | * Rename the node. |
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1080 | * |
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1081 | * @param old_parent_loc The old name's parent location. |
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1082 | * @param old_loc The old name's location. |
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1083 | * @param new_parent_loc The new name's parent location. |
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1084 | * @param new_name The new name. |
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1085 | * @return int |
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1086 | */ |
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1087 | int |
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1088 | rtems_rfs_rtems_rename(rtems_filesystem_location_info_t* old_parent_loc, |
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1089 | rtems_filesystem_location_info_t* old_loc, |
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1090 | rtems_filesystem_location_info_t* new_parent_loc, |
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1091 | const char* new_name) |
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1092 | { |
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1093 | rtems_rfs_file_system* fs = rtems_rfs_rtems_pathloc_dev (old_loc); |
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1094 | rtems_rfs_ino old_parent; |
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1095 | rtems_rfs_ino new_parent; |
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1096 | rtems_rfs_ino ino; |
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1097 | uint32_t doff; |
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1098 | int rc; |
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1099 | |
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1100 | old_parent = rtems_rfs_rtems_get_pathloc_ino (old_parent_loc); |
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1101 | new_parent = rtems_rfs_rtems_get_pathloc_ino (new_parent_loc); |
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1102 | |
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1103 | ino = rtems_rfs_rtems_get_pathloc_ino (old_loc); |
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1104 | doff = rtems_rfs_rtems_get_pathloc_doff (old_loc); |
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1105 | |
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1106 | if (rtems_rfs_rtems_trace (RTEMS_RFS_RTEMS_DEBUG_RENAME)) |
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1107 | printf ("rtems-rfs: rename: ino:%" PRId32 " doff:%" PRIu32 ", new parent:%" PRId32 " new name:%s\n", |
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1108 | ino, doff, new_parent, new_name); |
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1109 | |
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1110 | rtems_rfs_rtems_lock (fs); |
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1111 | |
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1112 | /* |
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1113 | * Link to the inode before unlinking so the inode is not erased when |
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1114 | * unlinked. |
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1115 | */ |
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1116 | rc = rtems_rfs_link (fs, new_name, strlen (new_name), new_parent, ino, true); |
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1117 | if (rc) |
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1118 | { |
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1119 | rtems_rfs_rtems_unlock (fs); |
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1120 | return rtems_rfs_rtems_error ("rename: linking", rc); |
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1121 | } |
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1122 | |
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1123 | /* |
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1124 | * Unlink all inodes even directories with the dir option as false because a |
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1125 | * directory may not be empty. |
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1126 | */ |
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1127 | rc = rtems_rfs_unlink (fs, old_parent, ino, doff, |
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1128 | rtems_rfs_unlink_dir_allowed); |
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1129 | if (rc) |
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1130 | { |
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1131 | rtems_rfs_rtems_unlock (fs); |
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1132 | return rtems_rfs_rtems_error ("rename: unlinking", rc); |
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1133 | } |
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1134 | |
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1135 | rtems_rfs_rtems_unlock (fs); |
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1136 | |
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1137 | return 0; |
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1138 | } |
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1139 | |
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1140 | /** |
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1141 | * Return the file system stat data. |
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1142 | * |
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1143 | * @param pathloc |
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1144 | * @param sb |
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1145 | * @return int |
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1146 | */ |
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1147 | int |
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1148 | rtems_rfs_rtems_statvfs (rtems_filesystem_location_info_t* pathloc, |
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1149 | struct statvfs* sb) |
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1150 | { |
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1151 | rtems_rfs_file_system* fs = rtems_rfs_rtems_pathloc_dev (pathloc); |
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1152 | size_t blocks; |
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1153 | size_t inodes; |
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1154 | |
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1155 | rtems_rfs_group_usage (fs, &blocks, &inodes); |
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1156 | |
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1157 | sb->f_bsize = rtems_rfs_fs_block_size (fs); |
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1158 | sb->f_frsize = rtems_rfs_fs_media_block_size (fs); |
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1159 | sb->f_blocks = rtems_rfs_fs_media_blocks (fs); |
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1160 | sb->f_bfree = rtems_rfs_fs_blocks (fs) - blocks; |
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1161 | sb->f_bavail = sb->f_bfree; |
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1162 | sb->f_files = rtems_rfs_fs_inodes (fs); |
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1163 | sb->f_ffree = rtems_rfs_fs_inodes (fs) - inodes; |
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1164 | sb->f_favail = sb->f_ffree; |
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1165 | sb->f_fsid = RTEMS_RFS_SB_MAGIC; |
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1166 | sb->f_flag = rtems_rfs_fs_flags (fs); |
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1167 | sb->f_namemax = rtems_rfs_fs_max_name (fs); |
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1168 | |
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1169 | return 0; |
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1170 | } |
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1171 | |
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1172 | /** |
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1173 | * Handler table for RFS link nodes |
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1174 | */ |
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1175 | const rtems_filesystem_file_handlers_r rtems_rfs_rtems_link_handlers = |
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1176 | { |
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1177 | .open_h = rtems_filesystem_default_open, |
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1178 | .close_h = rtems_filesystem_default_close, |
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1179 | .read_h = rtems_filesystem_default_read, |
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1180 | .write_h = rtems_filesystem_default_write, |
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1181 | .ioctl_h = rtems_filesystem_default_ioctl, |
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1182 | .lseek_h = rtems_filesystem_default_lseek, |
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1183 | .fstat_h = rtems_rfs_rtems_stat, |
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1184 | .fchmod_h = rtems_filesystem_default_fchmod, |
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1185 | .ftruncate_h = rtems_filesystem_default_ftruncate, |
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1186 | .fpathconf_h = rtems_filesystem_default_fpathconf, |
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1187 | .fsync_h = rtems_filesystem_default_fsync, |
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1188 | .fdatasync_h = rtems_filesystem_default_fdatasync, |
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1189 | .fcntl_h = rtems_filesystem_default_fcntl, |
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1190 | .rmnod_h = rtems_rfs_rtems_rmnod |
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1191 | }; |
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1192 | |
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1193 | /** |
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1194 | * Forward decl for the ops table. |
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1195 | */ |
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1196 | |
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1197 | int rtems_rfs_rtems_initialise (rtems_filesystem_mount_table_entry_t *mt_entry, |
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1198 | const void *data); |
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1199 | int rtems_rfs_rtems_shutdown (rtems_filesystem_mount_table_entry_t *mt_entry); |
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1200 | |
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1201 | /** |
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1202 | * RFS file system operations table. |
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1203 | */ |
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1204 | const rtems_filesystem_operations_table rtems_rfs_ops = |
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1205 | { |
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1206 | .evalpath_h = rtems_rfs_rtems_eval_path, |
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1207 | .evalformake_h = rtems_rfs_rtems_eval_for_make, |
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1208 | .link_h = rtems_rfs_rtems_link, |
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1209 | .unlink_h = rtems_rfs_rtems_unlink, |
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1210 | .node_type_h = rtems_rfs_rtems_node_type, |
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1211 | .mknod_h = rtems_rfs_rtems_mknod, |
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1212 | .chown_h = rtems_rfs_rtems_chown, |
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1213 | .freenod_h = rtems_filesystem_default_freenode, |
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1214 | .mount_h = rtems_filesystem_default_mount, |
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1215 | .fsmount_me_h = rtems_rfs_rtems_initialise, |
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1216 | .unmount_h = rtems_filesystem_default_unmount, |
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1217 | .fsunmount_me_h = rtems_rfs_rtems_shutdown, |
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1218 | .utime_h = rtems_rfs_rtems_utime, |
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1219 | .eval_link_h = rtems_filesystem_default_evaluate_link, /* never called cause we lie in the node type */ |
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1220 | .symlink_h = rtems_rfs_rtems_symlink, |
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1221 | .readlink_h = rtems_rfs_rtems_readlink, |
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1222 | .rename_h = rtems_rfs_rtems_rename, |
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1223 | .statvfs_h = rtems_rfs_rtems_statvfs |
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1224 | }; |
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1225 | |
---|
1226 | /** |
---|
1227 | * Open the file system. |
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1228 | */ |
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1229 | |
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1230 | int |
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1231 | rtems_rfs_rtems_initialise (rtems_filesystem_mount_table_entry_t* mt_entry, |
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1232 | const void* data) |
---|
1233 | { |
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1234 | rtems_rfs_rtems_private* rtems; |
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1235 | rtems_rfs_file_system* fs; |
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1236 | int rc; |
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1237 | |
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1238 | rtems = malloc (sizeof (rtems_rfs_rtems_private)); |
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1239 | if (!rtems) |
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1240 | return rtems_rfs_rtems_error ("initialise: local data", ENOMEM); |
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1241 | |
---|
1242 | memset (rtems, 0, sizeof (rtems_rfs_rtems_private)); |
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1243 | |
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1244 | rc = rtems_rfs_mutex_create (&rtems->access); |
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1245 | if (rc > 0) |
---|
1246 | { |
---|
1247 | free (rtems); |
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1248 | return rtems_rfs_rtems_error ("initialise: cannot create mutex", rc); |
---|
1249 | } |
---|
1250 | |
---|
1251 | rc = rtems_rfs_mutex_lock (&rtems->access); |
---|
1252 | if (rc > 0) |
---|
1253 | { |
---|
1254 | rtems_rfs_mutex_destroy (&rtems->access); |
---|
1255 | free (rtems); |
---|
1256 | return rtems_rfs_rtems_error ("initialise: cannot lock access mutex", rc); |
---|
1257 | } |
---|
1258 | |
---|
1259 | rc = rtems_rfs_fs_open (mt_entry->dev, rtems, 0, &fs); |
---|
1260 | if (rc) |
---|
1261 | { |
---|
1262 | free (rtems); |
---|
1263 | return rtems_rfs_rtems_error ("initialise: open", rc); |
---|
1264 | } |
---|
1265 | |
---|
1266 | mt_entry->fs_info = fs; |
---|
1267 | |
---|
1268 | mt_entry->mt_fs_root.node_access = (void*) RTEMS_RFS_ROOT_INO; |
---|
1269 | mt_entry->mt_fs_root.handlers = &rtems_rfs_rtems_dir_handlers; |
---|
1270 | mt_entry->mt_fs_root.ops = &rtems_rfs_ops; |
---|
1271 | |
---|
1272 | rtems_rfs_rtems_unlock (fs); |
---|
1273 | |
---|
1274 | return 0; |
---|
1275 | } |
---|
1276 | |
---|
1277 | /** |
---|
1278 | * Shutdown the file system. |
---|
1279 | */ |
---|
1280 | int |
---|
1281 | rtems_rfs_rtems_shutdown (rtems_filesystem_mount_table_entry_t* mt_entry) |
---|
1282 | { |
---|
1283 | rtems_rfs_file_system* fs = mt_entry->fs_info; |
---|
1284 | rtems_rfs_rtems_private* rtems; |
---|
1285 | int rc; |
---|
1286 | |
---|
1287 | rtems = rtems_rfs_fs_user (fs); |
---|
1288 | |
---|
1289 | rc = rtems_rfs_fs_close(fs); |
---|
1290 | |
---|
1291 | rtems_rfs_mutex_destroy (&rtems->access); |
---|
1292 | free (rtems); |
---|
1293 | |
---|
1294 | return rtems_rfs_rtems_error ("shutdown: close", rc); |
---|
1295 | } |
---|