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 <stdlib.h> |
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23 | |
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24 | #include <rtems/rfs/rtems-rfs-file.h> |
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25 | #include <rtems/rfs/rtems-rfs-dir.h> |
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26 | #include <rtems/rfs/rtems-rfs-link.h> |
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27 | #include "rtems-rfs-rtems.h" |
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28 | |
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29 | /** |
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30 | * The libio permissions for read/execute. |
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31 | */ |
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32 | #define RTEMS_LIBIO_PERMS_RX (RTEMS_LIBIO_PERMS_SEARCH | RTEMS_LIBIO_PERMS_READ) |
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33 | /** |
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34 | * The libio permissions for write/execute. |
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35 | */ |
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36 | #define RTEMS_LIBIO_PERMS_WX (RTEMS_LIBIO_PERMS_SEARCH | RTEMS_LIBIO_PERMS_WRITE) |
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37 | |
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38 | /** |
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39 | * Evaluate the path to a node that wishes to be accessed. The pathloc is |
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40 | * returned with the ino to the node to be accessed. |
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41 | * |
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42 | * The routine starts from the root stripping away any leading path separators |
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43 | * breaking the path up into the node names and checking an inode exists for |
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44 | * that node name. Permissions are checked to insure access to the node is |
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45 | * allowed. A path to a node must be accessable all the way even if the end |
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46 | * result is directly accessable. As a user on Linux try "ls /root/../tmp" and |
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47 | * you will see if fails. |
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48 | * |
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49 | * The whole process is complicated by crossmount paths where we head down into |
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50 | * this file system only to return to the top and out to a another mounted file |
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51 | * system. For example we are mounted on '/e' and the user enters "ls |
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52 | * /e/a/b/../../dev". We need to head down then back up. |
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53 | * |
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54 | * @param path |
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55 | * @param pathlen |
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56 | * @param flags |
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57 | * @param pathloc |
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58 | */ |
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59 | int |
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60 | rtems_rfs_rtems_eval_path (const char* path, |
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61 | int pathlen, |
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62 | int flags, |
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63 | rtems_filesystem_location_info_t* pathloc) |
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64 | { |
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65 | rtems_rfs_file_system* fs = rtems_rfs_rtems_pathloc_dev (pathloc); |
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66 | rtems_rfs_inode_handle inode; |
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67 | rtems_rfs_ino ino = rtems_rfs_rtems_get_pathloc_ino (pathloc); |
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68 | uint32_t doff = 0; |
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69 | const char* node; |
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70 | int node_len; |
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71 | int stripped; |
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72 | int rc; |
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73 | |
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74 | if (rtems_rfs_rtems_trace (RTEMS_RFS_RTEMS_DEBUG_EVAL_PATH)) |
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75 | printf ("rtems-rfs-rtems: eval-path: in: path:%s pathlen:%i ino:%ld\n", |
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76 | path, pathlen, ino); |
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77 | |
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78 | /* |
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79 | * Eat any separators at the start of the path. |
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80 | */ |
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81 | stripped = rtems_filesystem_prefix_separators (path, pathlen); |
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82 | path += stripped; |
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83 | pathlen -= stripped; |
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84 | |
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85 | rtems_rfs_rtems_lock (fs); |
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86 | |
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87 | while (true) |
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88 | { |
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89 | /* |
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90 | * Open and load the inode. |
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91 | */ |
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92 | rc = rtems_rfs_inode_open (fs, ino, &inode, true); |
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93 | if (rc > 0) |
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94 | { |
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95 | rtems_rfs_rtems_unlock (fs); |
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96 | return rtems_rfs_rtems_error ("eval_path: opening inode", rc); |
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97 | } |
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98 | |
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99 | /* |
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100 | * Is this the end of the pathname we where given ? |
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101 | */ |
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102 | if ((*path == '\0') || (pathlen == 0)) |
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103 | break; |
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104 | |
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105 | /* |
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106 | * If a directory the execute bit must be set for us to enter. |
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107 | */ |
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108 | if (RTEMS_RFS_S_ISDIR (rtems_rfs_inode_get_mode (&inode)) && |
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109 | !rtems_rfs_rtems_eval_perms (&inode, RTEMS_LIBIO_PERMS_SEARCH)) |
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110 | { |
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111 | rtems_rfs_inode_close (fs, &inode); |
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112 | rtems_rfs_rtems_unlock (fs); |
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113 | return rtems_rfs_rtems_error ("eval_path: eval perms", EACCES); |
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114 | } |
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115 | |
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116 | /* |
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117 | * Extract the node name we will look for this time around. |
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118 | */ |
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119 | node = path; |
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120 | node_len = 0; |
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121 | while (!rtems_filesystem_is_separator (*path) && |
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122 | (*path != '\0') && pathlen && |
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123 | (node_len < (rtems_rfs_fs_max_name (fs) - 1))) |
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124 | { |
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125 | path++; |
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126 | pathlen--; |
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127 | node_len++; |
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128 | } |
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129 | |
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130 | /* |
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131 | * Eat any separators at start of the path. |
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132 | */ |
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133 | stripped = rtems_filesystem_prefix_separators (path, pathlen); |
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134 | path += stripped; |
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135 | pathlen -= stripped; |
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136 | node_len += stripped; |
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137 | |
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138 | /* |
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139 | * If the node is the current directory and there is more path to come move |
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140 | * on it else we are at the inode we want. |
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141 | */ |
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142 | if (rtems_rfs_current_dir (node)) |
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143 | { |
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144 | if (*path) |
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145 | continue; |
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146 | break; |
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147 | } |
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148 | |
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149 | /* |
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150 | * If the node is a parent we must move up one directory. If the location |
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151 | * is on another file system we have a crossmount so we call that file |
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152 | * system to handle the remainder of the path. |
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153 | */ |
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154 | if (rtems_rfs_parent_dir (node)) |
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155 | { |
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156 | /* |
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157 | * If we are at root inode of the file system we have a crossmount path. |
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158 | */ |
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159 | if (ino == RTEMS_RFS_ROOT_INO) |
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160 | { |
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161 | if (rtems_rfs_rtems_trace (RTEMS_RFS_RTEMS_DEBUG_EVAL_PATH)) |
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162 | printf("rtems-rfs-rtems: eval-path: crossmount: path:%s (%d)\n", |
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163 | path - node_len, pathlen + node_len); |
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164 | rtems_rfs_inode_close (fs, &inode); |
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165 | rtems_rfs_rtems_unlock (fs); |
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166 | *pathloc = pathloc->mt_entry->mt_point_node; |
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167 | return (*pathloc->ops->evalpath_h)(path - node_len, pathlen + node_len, |
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168 | flags, pathloc); |
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169 | } |
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170 | |
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171 | /* |
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172 | * We need to find the parent of this node. |
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173 | */ |
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174 | rc = rtems_rfs_dir_lookup_ino (fs, &inode, "..", 2, &ino, &doff); |
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175 | if (rc > 0) |
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176 | { |
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177 | rtems_rfs_inode_close (fs, &inode); |
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178 | rtems_rfs_rtems_unlock (fs); |
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179 | return rtems_rfs_rtems_error ("eval_path: read parent inode", rc); |
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180 | } |
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181 | if (rtems_rfs_rtems_trace (RTEMS_RFS_RTEMS_DEBUG_EVAL_PATH)) |
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182 | printf("rtems-rfs-rtems: eval-path: parent: ino:%ld\n", ino); |
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183 | } |
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184 | else |
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185 | { |
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186 | /* |
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187 | * Look up the node name in this directory. If found drop through, close |
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188 | * the current inode and let the loop open the inode so the mode can be |
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189 | * read and handlers set. |
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190 | */ |
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191 | rc = rtems_rfs_dir_lookup_ino (fs, &inode, |
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192 | node, node_len - stripped, &ino, &doff); |
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193 | if (rc > 0) |
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194 | { |
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195 | rtems_rfs_inode_close (fs, &inode); |
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196 | rtems_rfs_rtems_unlock (fs); |
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197 | return ((errno = rc) == 0) ? 0 : -1; |
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198 | } |
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199 | if (rtems_rfs_rtems_trace (RTEMS_RFS_RTEMS_DEBUG_EVAL_PATH)) |
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200 | printf("rtems-rfs-rtems: eval-path: down: path:%s ino:%ld\n", node, ino); |
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201 | } |
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202 | |
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203 | rc = rtems_rfs_inode_close (fs, &inode); |
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204 | if (rc > 0) |
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205 | { |
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206 | rtems_rfs_inode_close (fs, &inode); |
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207 | rtems_rfs_rtems_unlock (fs); |
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208 | return rtems_rfs_rtems_error ("eval_path: closing node", rc); |
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209 | } |
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210 | } |
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211 | |
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212 | rtems_rfs_rtems_set_pathloc_ino (pathloc, ino); |
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213 | rtems_rfs_rtems_set_pathloc_doff (pathloc, doff); |
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214 | |
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215 | rc = rtems_rfs_rtems_set_handlers (pathloc, &inode) ? 0 : EIO; |
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216 | |
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217 | rtems_rfs_inode_close (fs, &inode); |
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218 | rtems_rfs_rtems_unlock (fs); |
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219 | |
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220 | if (rtems_rfs_rtems_trace (RTEMS_RFS_RTEMS_DEBUG_EVAL_PATH)) |
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221 | printf("rtems-rfs-rtems: eval-path: ino:%ld\n", ino); |
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222 | |
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223 | return rc; |
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224 | } |
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225 | |
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226 | /** |
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227 | * The following routine evaluates a path for a new node to be created. The |
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228 | * pathloc is returned with a pointer to the parent of the new node. The name |
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229 | * is returned with a pointer to the first character in the new node name. The |
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230 | * parent node is verified to be a directory. |
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231 | * |
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232 | * @param path |
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233 | * @param pathloc |
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234 | * @param name |
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235 | * @return int |
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236 | */ |
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237 | int |
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238 | rtems_rfs_rtems_eval_for_make (const char* path, |
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239 | rtems_filesystem_location_info_t* pathloc, |
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240 | const char** name) |
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241 | { |
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242 | rtems_rfs_file_system* fs = rtems_rfs_rtems_pathloc_dev (pathloc); |
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243 | rtems_rfs_inode_handle inode; |
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244 | rtems_rfs_ino ino = rtems_rfs_rtems_get_pathloc_ino (pathloc); |
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245 | rtems_rfs_ino node_ino; |
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246 | uint32_t doff = 0; |
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247 | const char* node; |
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248 | int node_len; |
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249 | int stripped; |
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250 | int rc; |
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251 | |
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252 | if (rtems_rfs_rtems_trace (RTEMS_RFS_RTEMS_DEBUG_EVAL_FOR_MAKE)) |
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253 | printf ("rtems-rfs-rtems: eval-for-make: path:%s ino:%ld\n", path, ino); |
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254 | |
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255 | *name = path + strlen (path); |
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256 | |
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257 | while (*name != path) |
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258 | { |
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259 | (*name)--; |
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260 | if (rtems_filesystem_is_separator (**name)) |
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261 | { |
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262 | (*name)++; |
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263 | break; |
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264 | } |
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265 | } |
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266 | |
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267 | /* |
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268 | * Eat any separators at start of the path. |
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269 | */ |
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270 | stripped = rtems_filesystem_prefix_separators (path, strlen(path)); |
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271 | path += stripped; |
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272 | |
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273 | rtems_rfs_rtems_lock (fs); |
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274 | |
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275 | while (true) |
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276 | { |
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277 | /* |
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278 | * Open and load the inode. |
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279 | */ |
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280 | rc = rtems_rfs_inode_open (fs, ino, &inode, true); |
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281 | if (rc > 0) |
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282 | { |
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283 | rtems_rfs_rtems_unlock (fs); |
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284 | return rtems_rfs_rtems_error ("eval_for_make: read ino", rc); |
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285 | } |
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286 | |
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287 | /* |
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288 | * If a directory the execute bit must be set for us to enter. |
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289 | */ |
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290 | if (RTEMS_RFS_S_ISDIR (rtems_rfs_inode_get_mode (&inode)) && |
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291 | !rtems_rfs_rtems_eval_perms (&inode, RTEMS_LIBIO_PERMS_SEARCH)) |
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292 | { |
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293 | rtems_rfs_inode_close (fs, &inode); |
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294 | rtems_rfs_rtems_unlock (fs); |
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295 | return rtems_rfs_rtems_error ("eval_for_make: eval perms", EACCES); |
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296 | } |
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297 | |
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298 | /* |
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299 | * Is this the end of the pathname we where given ? |
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300 | */ |
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301 | if (path == *name) |
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302 | break; |
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303 | |
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304 | /* |
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305 | * Extract the node name we will look for this time around. |
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306 | */ |
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307 | node = path; |
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308 | node_len = 0; |
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309 | while (!rtems_filesystem_is_separator(*path) && |
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310 | (*path != '\0') && |
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311 | (node_len < (rtems_rfs_fs_max_name (fs) - 1))) |
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312 | { |
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313 | node_len++; |
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314 | path++; |
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315 | } |
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316 | |
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317 | /* |
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318 | * Eat any separators at start of the new path. |
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319 | */ |
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320 | stripped = rtems_filesystem_prefix_separators (path, strlen (path)); |
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321 | path += stripped; |
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322 | node_len += stripped; |
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323 | |
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324 | /* |
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325 | * If the node is the current directory and there is more path to come move |
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326 | * on it else we are at the inode we want. |
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327 | */ |
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328 | if (rtems_rfs_current_dir (node)) |
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329 | { |
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330 | if (*path) |
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331 | continue; |
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332 | break; |
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333 | } |
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334 | |
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335 | /* |
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336 | * If the node is a parent we must move up one directory. If the location |
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337 | * is on another file system we have a crossmount so we call that file |
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338 | * system to handle the remainder of the path. |
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339 | */ |
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340 | if (rtems_rfs_parent_dir (path)) |
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341 | { |
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342 | /* |
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343 | * If we are at the root inode of the file system we have a crossmount |
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344 | * path. |
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345 | */ |
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346 | if (ino == RTEMS_RFS_ROOT_INO) |
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347 | { |
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348 | if (rtems_rfs_rtems_trace (RTEMS_RFS_RTEMS_DEBUG_EVAL_FOR_MAKE)) |
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349 | printf("rtems-rfs-rtems: eval-for-make: crossmount: path:%s\n", |
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350 | path - node_len); |
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351 | |
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352 | rtems_rfs_inode_close (fs, &inode); |
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353 | rtems_rfs_rtems_unlock (fs); |
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354 | *pathloc = pathloc->mt_entry->mt_point_node; |
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355 | return (*pathloc->ops->evalformake_h)(path - node_len, pathloc, name); |
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356 | } |
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357 | |
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358 | /* |
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359 | * If not a directory give and up return. We cannot change dir from a |
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360 | * regular file or device node. |
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361 | */ |
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362 | if (!RTEMS_RFS_S_ISDIR (rtems_rfs_inode_get_mode (&inode))) |
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363 | { |
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364 | rtems_rfs_inode_close (fs, &inode); |
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365 | rtems_rfs_rtems_unlock (fs); |
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366 | return rtems_rfs_rtems_error ("eval_for_make: not dir", ENOTSUP); |
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367 | } |
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368 | |
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369 | /* |
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370 | * We need to find the parent of this node. |
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371 | */ |
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372 | rc = rtems_rfs_dir_lookup_ino (fs, &inode, "..", 2, &ino, &doff); |
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373 | if (rc > 0) |
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374 | { |
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375 | rtems_rfs_inode_close (fs, &inode); |
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376 | rtems_rfs_rtems_unlock (fs); |
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377 | return rtems_rfs_rtems_error ("eval_for_make: read parent inode", rc); |
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378 | } |
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379 | if (rtems_rfs_rtems_trace (RTEMS_RFS_RTEMS_DEBUG_EVAL_FOR_MAKE)) |
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380 | printf ("rtems-rfs-rtems: eval-for-make: parent: ino:%ld\n", ino); |
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381 | } |
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382 | else |
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383 | { |
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384 | /* |
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385 | * Read the inode so we know it exists and what type it is. |
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386 | */ |
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387 | rc = rtems_rfs_dir_lookup_ino (fs, &inode, |
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388 | node, node_len - stripped, &ino, &doff); |
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389 | if (rc > 0) |
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390 | { |
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391 | rtems_rfs_inode_close (fs, &inode); |
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392 | rtems_rfs_rtems_unlock (fs); |
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393 | return rtems_rfs_rtems_error ("eval_for_make: reading inode", rc); |
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394 | } |
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395 | if (rtems_rfs_rtems_trace (RTEMS_RFS_RTEMS_DEBUG_EVAL_FOR_MAKE)) |
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396 | printf("rtems-rfs-rtems: eval-for-make: down: path:%s ino:%ld\n", |
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397 | node, ino); |
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398 | } |
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399 | |
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400 | rc = rtems_rfs_inode_close (fs, &inode); |
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401 | if (rc > 0) |
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402 | { |
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403 | rtems_rfs_rtems_unlock (fs); |
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404 | return rtems_rfs_rtems_error ("eval_for_make: closing node", rc); |
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405 | } |
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406 | } |
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407 | |
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408 | if (!RTEMS_RFS_S_ISDIR (rtems_rfs_inode_get_mode (&inode))) |
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409 | { |
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410 | rtems_rfs_inode_close (fs, &inode); |
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411 | rtems_rfs_rtems_unlock (fs); |
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412 | return rtems_rfs_rtems_error ("eval_for_make: not dir", ENOTDIR); |
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413 | } |
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414 | |
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415 | if (!rtems_rfs_rtems_eval_perms (&inode, RTEMS_LIBIO_PERMS_WX)) |
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416 | { |
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417 | rtems_rfs_inode_close (fs, &inode); |
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418 | rtems_rfs_rtems_unlock (fs); |
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419 | return rtems_rfs_rtems_error ("eval_for_make: cannot write", EACCES); |
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420 | } |
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421 | |
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422 | /* |
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423 | * Make sure the name does not already exists in the directory. |
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424 | */ |
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425 | rc = rtems_rfs_dir_lookup_ino (fs, &inode, *name, strlen (*name), |
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426 | &node_ino, &doff); |
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427 | if (rc == 0) |
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428 | { |
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429 | rtems_rfs_inode_close (fs, &inode); |
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430 | rtems_rfs_rtems_unlock (fs); |
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431 | return rtems_rfs_rtems_error ("eval_for_make: found name", EEXIST); |
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432 | } |
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433 | |
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434 | if (rc != ENOENT) |
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435 | { |
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436 | rtems_rfs_inode_close (fs, &inode); |
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437 | rtems_rfs_rtems_unlock (fs); |
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438 | return rtems_rfs_rtems_error ("eval_for_make: look up", rc); |
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439 | } |
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440 | |
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441 | /* |
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442 | * Set the parent ino in the path location. |
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443 | */ |
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444 | |
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445 | rtems_rfs_rtems_set_pathloc_ino (pathloc, ino); |
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446 | rtems_rfs_rtems_set_pathloc_doff (pathloc, doff); |
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447 | |
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448 | rc = rtems_rfs_rtems_set_handlers (pathloc, &inode) ? 0 : EIO; |
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449 | |
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450 | if (rtems_rfs_rtems_trace (RTEMS_RFS_RTEMS_DEBUG_EVAL_FOR_MAKE)) |
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451 | printf("rtems-rfs-rtems: eval-for-make: parent ino:%ld name:%s\n", |
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452 | ino, *name); |
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453 | |
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454 | rtems_rfs_inode_close (fs, &inode); |
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455 | rtems_rfs_rtems_unlock (fs); |
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456 | |
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457 | return rc; |
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458 | } |
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459 | |
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460 | /** |
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461 | * The following rouine creates a new link node under parent with the name |
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462 | * given in name. The link node is set to point to the node at to_loc. |
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463 | * |
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464 | * @param to_loc |
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465 | * @param parent_loc |
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466 | * @param name |
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467 | * @return int |
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468 | */ |
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469 | int |
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470 | rtems_rfs_rtems_link (rtems_filesystem_location_info_t* to_loc, |
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471 | rtems_filesystem_location_info_t* parent_loc, |
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472 | const char* name) |
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473 | { |
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474 | rtems_rfs_file_system* fs = rtems_rfs_rtems_pathloc_dev (to_loc); |
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475 | rtems_rfs_ino target = rtems_rfs_rtems_get_pathloc_ino (to_loc); |
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476 | rtems_rfs_ino parent = rtems_rfs_rtems_get_pathloc_ino (parent_loc); |
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477 | int rc; |
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478 | |
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479 | if (rtems_rfs_rtems_trace (RTEMS_RFS_RTEMS_DEBUG_LINK)) |
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480 | printf ("rtems-rfs-rtems: link: in: parent:%ld target:%ld\n", |
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481 | parent, target); |
---|
482 | |
---|
483 | rtems_rfs_rtems_lock (fs); |
---|
484 | |
---|
485 | rc = rtems_rfs_link (fs, name, strlen (name), parent, target, false); |
---|
486 | if (rc) |
---|
487 | { |
---|
488 | rtems_rfs_rtems_unlock (fs); |
---|
489 | return rtems_rfs_rtems_error ("link: linking", rc); |
---|
490 | } |
---|
491 | |
---|
492 | rtems_rfs_rtems_unlock (fs); |
---|
493 | |
---|
494 | return 0; |
---|
495 | } |
---|
496 | |
---|
497 | /** |
---|
498 | * Routine to remove a link node from the file system. |
---|
499 | * |
---|
500 | * @param parent_loc |
---|
501 | * @param loc |
---|
502 | * @return int |
---|
503 | */ |
---|
504 | |
---|
505 | int |
---|
506 | rtems_rfs_rtems_unlink (rtems_filesystem_location_info_t* parent_loc, |
---|
507 | rtems_filesystem_location_info_t* loc) |
---|
508 | { |
---|
509 | rtems_rfs_file_system* fs = rtems_rfs_rtems_pathloc_dev (parent_loc); |
---|
510 | rtems_rfs_ino parent = rtems_rfs_rtems_get_pathloc_ino (parent_loc); |
---|
511 | rtems_rfs_ino ino = rtems_rfs_rtems_get_pathloc_ino (loc); |
---|
512 | uint32_t doff = rtems_rfs_rtems_get_pathloc_doff (loc); |
---|
513 | int rc; |
---|
514 | |
---|
515 | rtems_rfs_rtems_lock (fs); |
---|
516 | |
---|
517 | if (rtems_rfs_rtems_trace (RTEMS_RFS_RTEMS_DEBUG_UNLINK)) |
---|
518 | printf("rtems-rfs-rtems: unlink: parent:%ld doff:%lu ino:%ld\n", |
---|
519 | parent, doff, ino); |
---|
520 | |
---|
521 | rc = rtems_rfs_unlink (fs, parent, ino, doff, rtems_rfs_unlink_dir_denied); |
---|
522 | if (rc) |
---|
523 | { |
---|
524 | rtems_rfs_rtems_unlock (fs); |
---|
525 | return rtems_rfs_rtems_error ("unlink: unlink inode", rc); |
---|
526 | } |
---|
527 | |
---|
528 | rtems_rfs_rtems_unlock (fs); |
---|
529 | |
---|
530 | return 0; |
---|
531 | } |
---|
532 | |
---|
533 | /** |
---|
534 | * The following verifies that and returns the type of node that the loc refers |
---|
535 | * to. |
---|
536 | * |
---|
537 | * @param pathloc |
---|
538 | * @return rtems_filesystem_node_types_t |
---|
539 | */ |
---|
540 | |
---|
541 | rtems_filesystem_node_types_t |
---|
542 | rtems_rfs_rtems_node_type (rtems_filesystem_location_info_t* pathloc) |
---|
543 | { |
---|
544 | rtems_rfs_file_system* fs = rtems_rfs_rtems_pathloc_dev (pathloc); |
---|
545 | rtems_rfs_ino ino = rtems_rfs_rtems_get_pathloc_ino (pathloc); |
---|
546 | rtems_filesystem_node_types_t type; |
---|
547 | rtems_rfs_inode_handle inode; |
---|
548 | uint16_t mode; |
---|
549 | int rc; |
---|
550 | |
---|
551 | rtems_rfs_rtems_lock (fs); |
---|
552 | |
---|
553 | rc = rtems_rfs_inode_open (fs, ino, &inode, true); |
---|
554 | if (rc > 0) |
---|
555 | { |
---|
556 | rtems_rfs_rtems_unlock (fs); |
---|
557 | return rtems_rfs_rtems_error ("node_type: opening inode", rc); |
---|
558 | } |
---|
559 | |
---|
560 | /* |
---|
561 | * Do not return RTEMS_FILESYSTEM_HARD_LINK because this would result in an |
---|
562 | * eval link which does not make sense in the case of the RFS file |
---|
563 | * system. All directory entries are links to an inode. A link such as a HARD |
---|
564 | * link is actually the normal path to a regular file, directory, device |
---|
565 | * etc's inode. Links to inodes can be considered "the real" one, yet they |
---|
566 | * are all links. |
---|
567 | */ |
---|
568 | mode = rtems_rfs_inode_get_mode (&inode); |
---|
569 | if (RTEMS_RFS_S_ISDIR (mode)) |
---|
570 | type = RTEMS_FILESYSTEM_DIRECTORY; |
---|
571 | else if (RTEMS_RFS_S_ISLNK (mode)) |
---|
572 | type = RTEMS_FILESYSTEM_SYM_LINK; |
---|
573 | else if (RTEMS_RFS_S_ISBLK (mode) || RTEMS_RFS_S_ISCHR (mode)) |
---|
574 | type = RTEMS_FILESYSTEM_DEVICE; |
---|
575 | else |
---|
576 | type = RTEMS_FILESYSTEM_MEMORY_FILE; |
---|
577 | |
---|
578 | rc = rtems_rfs_inode_close (fs, &inode); |
---|
579 | if (rc > 0) |
---|
580 | { |
---|
581 | rtems_rfs_rtems_unlock (fs); |
---|
582 | return rtems_rfs_rtems_error ("node_type: closing inode", rc); |
---|
583 | } |
---|
584 | |
---|
585 | rtems_rfs_rtems_unlock (fs); |
---|
586 | |
---|
587 | return type; |
---|
588 | } |
---|
589 | |
---|
590 | /** |
---|
591 | * This routine is the implementation of the chown() system call for the |
---|
592 | * RFS. |
---|
593 | * |
---|
594 | * @param pathloc |
---|
595 | * @param owner |
---|
596 | * @param group |
---|
597 | * return int |
---|
598 | */ |
---|
599 | |
---|
600 | static int |
---|
601 | rtems_rfs_rtems_chown (rtems_filesystem_location_info_t *pathloc, |
---|
602 | uid_t owner, |
---|
603 | gid_t group) |
---|
604 | { |
---|
605 | rtems_rfs_file_system* fs = rtems_rfs_rtems_pathloc_dev (pathloc); |
---|
606 | rtems_rfs_ino ino = rtems_rfs_rtems_get_pathloc_ino (pathloc); |
---|
607 | rtems_rfs_inode_handle inode; |
---|
608 | #if defined (RTEMS_POSIX_API) |
---|
609 | uid_t uid; |
---|
610 | #endif |
---|
611 | int rc; |
---|
612 | |
---|
613 | if (rtems_rfs_rtems_trace (RTEMS_RFS_RTEMS_DEBUG_CHOWN)) |
---|
614 | printf ("rtems-rfs-rtems: chown: in: ino:%ld uid:%d gid:%d\n", |
---|
615 | ino, owner, group); |
---|
616 | |
---|
617 | rtems_rfs_rtems_lock (fs); |
---|
618 | |
---|
619 | rc = rtems_rfs_inode_open (fs, ino, &inode, true); |
---|
620 | if (rc > 0) |
---|
621 | { |
---|
622 | rtems_rfs_rtems_unlock (fs); |
---|
623 | return rtems_rfs_rtems_error ("chown: opening inode", rc); |
---|
624 | } |
---|
625 | |
---|
626 | /* |
---|
627 | * Verify I am the owner of the node or the super user. |
---|
628 | */ |
---|
629 | |
---|
630 | #if defined (RTEMS_POSIX_API) |
---|
631 | uid = geteuid(); |
---|
632 | |
---|
633 | if ((uid != rtems_rfs_inode_get_uid (&inode)) && (uid != 0)) |
---|
634 | { |
---|
635 | rtems_rfs_inode_close (fs, &inode); |
---|
636 | rtems_rfs_rtems_unlock (fs); |
---|
637 | return rtems_rfs_rtems_error ("chown: not able", EPERM); |
---|
638 | } |
---|
639 | #endif |
---|
640 | |
---|
641 | rtems_rfs_inode_set_uid_gid (&inode, owner, group); |
---|
642 | |
---|
643 | rc = rtems_rfs_inode_close (fs, &inode); |
---|
644 | if (rc) |
---|
645 | { |
---|
646 | rtems_rfs_rtems_unlock (fs); |
---|
647 | return rtems_rfs_rtems_error ("chown: closing inode", rc); |
---|
648 | } |
---|
649 | |
---|
650 | rtems_rfs_rtems_unlock (fs); |
---|
651 | |
---|
652 | return 0; |
---|
653 | } |
---|
654 | |
---|
655 | /** |
---|
656 | * This routine is the RFS free node handler for the file system operations |
---|
657 | * table. The RFS does not need to free anything. |
---|
658 | * |
---|
659 | * @param pathloc |
---|
660 | * @retval 0 Always returned. |
---|
661 | */ |
---|
662 | |
---|
663 | int |
---|
664 | rtems_rfs_rtems_freenodinfo (rtems_filesystem_location_info_t* pathloc) |
---|
665 | { |
---|
666 | return 0; |
---|
667 | } |
---|
668 | |
---|
669 | /** |
---|
670 | * This routine is the implementation of the utime() system call for the |
---|
671 | * RFS. |
---|
672 | * |
---|
673 | * @param pathloc |
---|
674 | * @param atime |
---|
675 | * @param mtime |
---|
676 | * return int |
---|
677 | */ |
---|
678 | |
---|
679 | int |
---|
680 | rtems_rfs_rtems_utime(rtems_filesystem_location_info_t* pathloc, |
---|
681 | time_t atime, |
---|
682 | time_t mtime) |
---|
683 | { |
---|
684 | rtems_rfs_file_system* fs = rtems_rfs_rtems_pathloc_dev (pathloc); |
---|
685 | rtems_rfs_ino ino = rtems_rfs_rtems_get_pathloc_ino (pathloc); |
---|
686 | rtems_rfs_inode_handle inode; |
---|
687 | int rc; |
---|
688 | |
---|
689 | rtems_rfs_rtems_lock (fs); |
---|
690 | |
---|
691 | rc = rtems_rfs_inode_open (fs, ino, &inode, true); |
---|
692 | if (rc) |
---|
693 | { |
---|
694 | rtems_rfs_rtems_unlock (fs); |
---|
695 | return rtems_rfs_rtems_error ("utime: read inode", rc); |
---|
696 | } |
---|
697 | |
---|
698 | rtems_rfs_inode_set_atime (&inode, atime); |
---|
699 | rtems_rfs_inode_set_mtime (&inode, mtime); |
---|
700 | |
---|
701 | rc = rtems_rfs_inode_close (fs, &inode); |
---|
702 | if (rc) |
---|
703 | { |
---|
704 | rtems_rfs_rtems_unlock (fs); |
---|
705 | return rtems_rfs_rtems_error ("utime: closing inode", rc); |
---|
706 | } |
---|
707 | |
---|
708 | rtems_rfs_rtems_unlock (fs); |
---|
709 | |
---|
710 | return 0; |
---|
711 | } |
---|
712 | |
---|
713 | /** |
---|
714 | * The following rouine creates a new symbolic link node under parent with the |
---|
715 | * name given in name. The node is set to point to the node at to_loc. |
---|
716 | * |
---|
717 | * @param parent_loc |
---|
718 | * @param link_name |
---|
719 | * @param node_name |
---|
720 | * return int |
---|
721 | */ |
---|
722 | |
---|
723 | int |
---|
724 | rtems_rfs_rtems_symlink (rtems_filesystem_location_info_t* parent_loc, |
---|
725 | const char* link_name, |
---|
726 | const char* node_name) |
---|
727 | { |
---|
728 | rtems_rfs_file_system* fs = rtems_rfs_rtems_pathloc_dev (parent_loc); |
---|
729 | rtems_rfs_ino parent = rtems_rfs_rtems_get_pathloc_ino (parent_loc); |
---|
730 | uid_t uid; |
---|
731 | gid_t gid; |
---|
732 | int rc; |
---|
733 | |
---|
734 | #if defined(RTEMS_POSIX_API) |
---|
735 | uid = geteuid (); |
---|
736 | gid = getegid (); |
---|
737 | #else |
---|
738 | uid = 0; |
---|
739 | gid = 0; |
---|
740 | #endif |
---|
741 | |
---|
742 | rtems_rfs_rtems_lock (fs); |
---|
743 | |
---|
744 | rc = rtems_rfs_symlink (fs, node_name, strlen (node_name), |
---|
745 | link_name, strlen (link_name), |
---|
746 | uid, gid, parent); |
---|
747 | if (rc) |
---|
748 | { |
---|
749 | rtems_rfs_rtems_unlock (fs); |
---|
750 | return rtems_rfs_rtems_error ("symlink: linking", rc); |
---|
751 | } |
---|
752 | |
---|
753 | rtems_rfs_rtems_unlock (fs); |
---|
754 | |
---|
755 | return 0; |
---|
756 | } |
---|
757 | |
---|
758 | /** |
---|
759 | * The following rouine puts the symblic links destination name into buf. |
---|
760 | * |
---|
761 | * @param loc |
---|
762 | * @param buf |
---|
763 | * @param bufsize |
---|
764 | * @return int |
---|
765 | */ |
---|
766 | |
---|
767 | int |
---|
768 | rtems_rfs_rtems_readlink (rtems_filesystem_location_info_t* pathloc, |
---|
769 | char* buf, |
---|
770 | size_t bufsize) |
---|
771 | { |
---|
772 | rtems_rfs_file_system* fs = rtems_rfs_rtems_pathloc_dev (pathloc); |
---|
773 | rtems_rfs_ino ino = rtems_rfs_rtems_get_pathloc_ino (pathloc); |
---|
774 | size_t length; |
---|
775 | int rc; |
---|
776 | |
---|
777 | if (rtems_rfs_rtems_trace (RTEMS_RFS_RTEMS_DEBUG_READLINK)) |
---|
778 | printf ("rtems-rfs-rtems: readlink: in: ino:%ld\n", ino); |
---|
779 | |
---|
780 | rtems_rfs_rtems_lock (fs); |
---|
781 | |
---|
782 | rc = rtems_rfs_symlink_read (fs, ino, buf, bufsize, &length); |
---|
783 | if (rc) |
---|
784 | { |
---|
785 | rtems_rfs_rtems_unlock (fs); |
---|
786 | return rtems_rfs_rtems_error ("readlink: reading link", rc); |
---|
787 | } |
---|
788 | |
---|
789 | rtems_rfs_rtems_unlock (fs); |
---|
790 | |
---|
791 | return (int) length; |
---|
792 | } |
---|
793 | |
---|
794 | /** |
---|
795 | * File change mode routine. |
---|
796 | * |
---|
797 | * @param pathloc |
---|
798 | * @param mode |
---|
799 | * @return int |
---|
800 | */ |
---|
801 | int |
---|
802 | rtems_rfs_rtems_fchmod (rtems_filesystem_location_info_t* pathloc, |
---|
803 | mode_t mode) |
---|
804 | { |
---|
805 | rtems_rfs_file_system* fs = rtems_rfs_rtems_pathloc_dev (pathloc); |
---|
806 | rtems_rfs_ino ino = rtems_rfs_rtems_get_pathloc_ino (pathloc); |
---|
807 | rtems_rfs_inode_handle inode; |
---|
808 | uint16_t imode; |
---|
809 | #if defined (RTEMS_POSIX_API) |
---|
810 | uid_t uid; |
---|
811 | #endif |
---|
812 | int rc; |
---|
813 | |
---|
814 | if (rtems_rfs_rtems_trace (RTEMS_RFS_RTEMS_DEBUG_FCHMOD)) |
---|
815 | printf ("rtems-rfs-rtems: fchmod: in: ino:%ld mode:%06o\n", |
---|
816 | ino, (unsigned int) mode); |
---|
817 | |
---|
818 | rtems_rfs_rtems_lock (fs); |
---|
819 | |
---|
820 | rc = rtems_rfs_inode_open (fs, ino, &inode, true); |
---|
821 | if (rc) |
---|
822 | { |
---|
823 | rtems_rfs_rtems_unlock (fs); |
---|
824 | return rtems_rfs_rtems_error ("fchmod: opening inode", rc); |
---|
825 | } |
---|
826 | |
---|
827 | imode = rtems_rfs_inode_get_mode (&inode); |
---|
828 | |
---|
829 | /* |
---|
830 | * Verify I am the owner of the node or the super user. |
---|
831 | */ |
---|
832 | #if defined (RTEMS_POSIX_API) |
---|
833 | uid = geteuid(); |
---|
834 | |
---|
835 | if ((uid != rtems_rfs_inode_get_uid (&inode)) && (uid != 0)) |
---|
836 | { |
---|
837 | rtems_rfs_inode_close (fs, &inode); |
---|
838 | rtems_rfs_rtems_unlock (fs); |
---|
839 | return rtems_rfs_rtems_error ("fchmod: not owner", EPERM); |
---|
840 | } |
---|
841 | #endif |
---|
842 | |
---|
843 | imode &= ~(S_IRWXU | S_IRWXG | S_IRWXO | S_ISUID | S_ISGID | S_ISVTX); |
---|
844 | imode |= mode & (S_IRWXU | S_IRWXG | S_IRWXO | S_ISUID | S_ISGID | S_ISVTX); |
---|
845 | |
---|
846 | rtems_rfs_inode_set_mode (&inode, imode); |
---|
847 | |
---|
848 | rc = rtems_rfs_inode_close (fs, &inode); |
---|
849 | if (rc > 0) |
---|
850 | { |
---|
851 | rtems_rfs_rtems_unlock (fs); |
---|
852 | return rtems_rfs_rtems_error ("fchmod: closing inode", rc); |
---|
853 | } |
---|
854 | |
---|
855 | rtems_rfs_rtems_unlock (fs); |
---|
856 | |
---|
857 | return 0; |
---|
858 | } |
---|
859 | |
---|
860 | /** |
---|
861 | * The following routine does a fcntl on an node. |
---|
862 | * |
---|
863 | * @param cmd |
---|
864 | * @param iop |
---|
865 | * @return int |
---|
866 | */ |
---|
867 | |
---|
868 | int |
---|
869 | rtems_rfs_rtems_fcntl (int cmd, |
---|
870 | rtems_libio_t* iop) |
---|
871 | { |
---|
872 | return 0; |
---|
873 | } |
---|
874 | |
---|
875 | /** |
---|
876 | * The following routine does a stat on a node. |
---|
877 | * |
---|
878 | * @param pathloc |
---|
879 | * @param buf |
---|
880 | * @return int |
---|
881 | */ |
---|
882 | |
---|
883 | int |
---|
884 | rtems_rfs_rtems_stat (rtems_filesystem_location_info_t* pathloc, |
---|
885 | struct stat* buf) |
---|
886 | { |
---|
887 | rtems_rfs_file_system* fs = rtems_rfs_rtems_pathloc_dev (pathloc); |
---|
888 | rtems_rfs_ino ino = rtems_rfs_rtems_get_pathloc_ino (pathloc); |
---|
889 | rtems_rfs_inode_handle inode; |
---|
890 | rtems_rfs_file_shared* shared; |
---|
891 | uint16_t mode; |
---|
892 | int rc; |
---|
893 | |
---|
894 | if (rtems_rfs_rtems_trace (RTEMS_RFS_RTEMS_DEBUG_STAT)) |
---|
895 | printf ("rtems-rfs-rtems: stat: in: ino:%ld\n", ino); |
---|
896 | |
---|
897 | rtems_rfs_rtems_lock (fs); |
---|
898 | |
---|
899 | rc = rtems_rfs_inode_open (fs, ino, &inode, true); |
---|
900 | if (rc) |
---|
901 | { |
---|
902 | rtems_rfs_rtems_unlock (fs); |
---|
903 | return rtems_rfs_rtems_error ("stat: opening inode", rc); |
---|
904 | } |
---|
905 | |
---|
906 | mode = rtems_rfs_inode_get_mode (&inode); |
---|
907 | |
---|
908 | if (RTEMS_RFS_S_ISCHR (mode) || RTEMS_RFS_S_ISBLK (mode)) |
---|
909 | { |
---|
910 | buf->st_rdev = |
---|
911 | rtems_filesystem_make_dev_t (rtems_rfs_inode_get_block (&inode, 0), |
---|
912 | rtems_rfs_inode_get_block (&inode, 1)); |
---|
913 | } |
---|
914 | |
---|
915 | buf->st_dev = rtems_rfs_fs_device (fs); |
---|
916 | buf->st_ino = ino; |
---|
917 | buf->st_mode = rtems_rfs_rtems_mode (mode); |
---|
918 | buf->st_nlink = rtems_rfs_inode_get_links (&inode); |
---|
919 | buf->st_uid = rtems_rfs_inode_get_uid (&inode); |
---|
920 | buf->st_gid = rtems_rfs_inode_get_gid (&inode); |
---|
921 | |
---|
922 | /* |
---|
923 | * Need to check is the ino is an open file. If so we take the values from |
---|
924 | * the open file rather than the inode. |
---|
925 | */ |
---|
926 | shared = rtems_rfs_file_get_shared (fs, ino); |
---|
927 | |
---|
928 | if (shared) |
---|
929 | { |
---|
930 | buf->st_atime = rtems_rfs_file_shared_get_atime (shared); |
---|
931 | buf->st_mtime = rtems_rfs_file_shared_get_mtime (shared); |
---|
932 | buf->st_ctime = rtems_rfs_file_shared_get_ctime (shared); |
---|
933 | buf->st_blocks = rtems_rfs_file_shared_get_block_count (shared); |
---|
934 | |
---|
935 | if (S_ISLNK (buf->st_mode)) |
---|
936 | buf->st_size = rtems_rfs_file_shared_get_block_offset (shared); |
---|
937 | else |
---|
938 | buf->st_size = rtems_rfs_file_shared_get_size (fs, shared); |
---|
939 | } |
---|
940 | else |
---|
941 | { |
---|
942 | buf->st_atime = rtems_rfs_inode_get_atime (&inode); |
---|
943 | buf->st_mtime = rtems_rfs_inode_get_mtime (&inode); |
---|
944 | buf->st_ctime = rtems_rfs_inode_get_ctime (&inode); |
---|
945 | buf->st_blocks = rtems_rfs_inode_get_block_count (&inode); |
---|
946 | |
---|
947 | if (S_ISLNK (buf->st_mode)) |
---|
948 | buf->st_size = rtems_rfs_inode_get_block_offset (&inode); |
---|
949 | else |
---|
950 | buf->st_size = rtems_rfs_inode_get_size (fs, &inode); |
---|
951 | } |
---|
952 | |
---|
953 | buf->st_blksize = rtems_rfs_fs_block_size (fs); |
---|
954 | |
---|
955 | rc = rtems_rfs_inode_close (fs, &inode); |
---|
956 | if (rc > 0) |
---|
957 | { |
---|
958 | rtems_rfs_rtems_unlock (fs); |
---|
959 | return rtems_rfs_rtems_error ("stat: closing inode", rc); |
---|
960 | } |
---|
961 | |
---|
962 | rtems_rfs_rtems_unlock (fs); |
---|
963 | return 0; |
---|
964 | } |
---|
965 | |
---|
966 | /** |
---|
967 | * Routine to create a node in the RFS file system. |
---|
968 | * |
---|
969 | * @param name |
---|
970 | * @param mode |
---|
971 | * @param dev |
---|
972 | * @param pathloc |
---|
973 | * @return int |
---|
974 | */ |
---|
975 | |
---|
976 | int |
---|
977 | rtems_rfs_rtems_mknod (const char *name, |
---|
978 | mode_t mode, |
---|
979 | dev_t dev, |
---|
980 | rtems_filesystem_location_info_t *pathloc) |
---|
981 | { |
---|
982 | rtems_rfs_file_system* fs = rtems_rfs_rtems_pathloc_dev (pathloc); |
---|
983 | rtems_rfs_ino parent = rtems_rfs_rtems_get_pathloc_ino (pathloc); |
---|
984 | rtems_rfs_ino ino; |
---|
985 | rtems_rfs_inode_handle inode; |
---|
986 | uid_t uid; |
---|
987 | gid_t gid; |
---|
988 | int rc; |
---|
989 | |
---|
990 | #if defined(RTEMS_POSIX_API) |
---|
991 | uid = geteuid (); |
---|
992 | gid = getegid (); |
---|
993 | #else |
---|
994 | uid = 0; |
---|
995 | gid = 0; |
---|
996 | #endif |
---|
997 | |
---|
998 | rtems_rfs_rtems_lock (fs); |
---|
999 | |
---|
1000 | rc = rtems_rfs_inode_create (fs, parent, name, strlen (name), |
---|
1001 | rtems_rfs_rtems_imode (mode), |
---|
1002 | 1, uid, gid, &ino); |
---|
1003 | if (rc > 0) |
---|
1004 | { |
---|
1005 | rtems_rfs_rtems_unlock (fs); |
---|
1006 | return rtems_rfs_rtems_error ("mknod: inode create", rc); |
---|
1007 | } |
---|
1008 | |
---|
1009 | rc = rtems_rfs_inode_open (fs, ino, &inode, true); |
---|
1010 | if (rc > 0) |
---|
1011 | { |
---|
1012 | rtems_rfs_rtems_unlock (fs); |
---|
1013 | return rtems_rfs_rtems_error ("mknod: inode open", rc); |
---|
1014 | } |
---|
1015 | |
---|
1016 | if (S_ISDIR(mode) || S_ISREG(mode)) |
---|
1017 | { |
---|
1018 | } |
---|
1019 | else if (S_ISCHR (mode) || S_ISBLK (mode)) |
---|
1020 | { |
---|
1021 | int major; |
---|
1022 | int minor; |
---|
1023 | rtems_filesystem_split_dev_t (dev, major, minor); |
---|
1024 | rtems_rfs_inode_set_block (&inode, 0, major); |
---|
1025 | rtems_rfs_inode_set_block (&inode, 1, minor); |
---|
1026 | } |
---|
1027 | else |
---|
1028 | { |
---|
1029 | rtems_rfs_inode_close (fs, &inode); |
---|
1030 | rtems_rfs_rtems_unlock (fs); |
---|
1031 | return rtems_rfs_rtems_error ("mknod: bad mode", EINVAL); |
---|
1032 | } |
---|
1033 | |
---|
1034 | rc = rtems_rfs_inode_close (fs, &inode); |
---|
1035 | if (rc > 0) |
---|
1036 | { |
---|
1037 | rtems_rfs_rtems_unlock (fs); |
---|
1038 | return rtems_rfs_rtems_error ("mknod: closing inode", rc); |
---|
1039 | } |
---|
1040 | |
---|
1041 | rtems_rfs_rtems_unlock (fs); |
---|
1042 | return 0; |
---|
1043 | } |
---|
1044 | |
---|
1045 | /** |
---|
1046 | * Routine to remove a node from the RFS file system. |
---|
1047 | * |
---|
1048 | * @param parent_pathloc |
---|
1049 | * @param pathloc |
---|
1050 | * @return int |
---|
1051 | */ |
---|
1052 | int |
---|
1053 | rtems_rfs_rtems_rmnod (rtems_filesystem_location_info_t* parent_pathloc, |
---|
1054 | rtems_filesystem_location_info_t* pathloc) |
---|
1055 | { |
---|
1056 | rtems_rfs_file_system* fs = rtems_rfs_rtems_pathloc_dev (pathloc); |
---|
1057 | rtems_rfs_ino parent = rtems_rfs_rtems_get_pathloc_ino (parent_pathloc); |
---|
1058 | rtems_rfs_ino ino = rtems_rfs_rtems_get_pathloc_ino (pathloc); |
---|
1059 | uint32_t doff = rtems_rfs_rtems_get_pathloc_doff (pathloc); |
---|
1060 | int rc; |
---|
1061 | |
---|
1062 | if (rtems_rfs_rtems_trace (RTEMS_RFS_RTEMS_DEBUG_RMNOD)) |
---|
1063 | printf ("rtems-rfs: rmnod: parent:%ld doff:%lu, ino:%ld\n", |
---|
1064 | parent, doff, ino); |
---|
1065 | |
---|
1066 | rtems_rfs_rtems_lock (fs); |
---|
1067 | |
---|
1068 | rc = rtems_rfs_unlink (fs, parent, ino, doff, rtems_rfs_unlink_dir_denied); |
---|
1069 | if (rc) |
---|
1070 | { |
---|
1071 | rtems_rfs_rtems_unlock (fs); |
---|
1072 | return rtems_rfs_rtems_error ("rmnod: unlinking", rc); |
---|
1073 | } |
---|
1074 | |
---|
1075 | rtems_rfs_rtems_unlock (fs); |
---|
1076 | return 0; |
---|
1077 | } |
---|
1078 | |
---|
1079 | /** |
---|
1080 | * The following routine does a sync on an inode node. Currently it flushes |
---|
1081 | * everything related to this device. |
---|
1082 | * |
---|
1083 | * @param iop |
---|
1084 | * @return int |
---|
1085 | */ |
---|
1086 | int |
---|
1087 | rtems_rfs_rtems_fdatasync (rtems_libio_t* iop) |
---|
1088 | { |
---|
1089 | int rc; |
---|
1090 | |
---|
1091 | rc = rtems_rfs_buffer_sync (rtems_rfs_rtems_pathloc_dev (&iop->pathinfo)); |
---|
1092 | if (rc) |
---|
1093 | return rtems_rfs_rtems_error ("fdatasync: sync", rc); |
---|
1094 | |
---|
1095 | return 0; |
---|
1096 | } |
---|
1097 | |
---|
1098 | /** |
---|
1099 | * Rename the node. |
---|
1100 | * |
---|
1101 | * @param old_parent_loc The old name's parent location. |
---|
1102 | * @param old_loc The old name's location. |
---|
1103 | * @param new_parent_loc The new name's parent location. |
---|
1104 | * @param new_name The new name. |
---|
1105 | * @return int |
---|
1106 | */ |
---|
1107 | int |
---|
1108 | rtems_rfs_rtems_rename(rtems_filesystem_location_info_t* old_parent_loc, |
---|
1109 | rtems_filesystem_location_info_t* old_loc, |
---|
1110 | rtems_filesystem_location_info_t* new_parent_loc, |
---|
1111 | const char* new_name) |
---|
1112 | { |
---|
1113 | rtems_rfs_file_system* fs = rtems_rfs_rtems_pathloc_dev (old_loc); |
---|
1114 | rtems_rfs_ino old_parent; |
---|
1115 | rtems_rfs_ino new_parent; |
---|
1116 | rtems_rfs_ino ino; |
---|
1117 | uint32_t doff; |
---|
1118 | int rc; |
---|
1119 | |
---|
1120 | old_parent = rtems_rfs_rtems_get_pathloc_ino (old_parent_loc); |
---|
1121 | new_parent = rtems_rfs_rtems_get_pathloc_ino (new_parent_loc); |
---|
1122 | |
---|
1123 | ino = rtems_rfs_rtems_get_pathloc_ino (old_loc); |
---|
1124 | doff = rtems_rfs_rtems_get_pathloc_doff (old_loc); |
---|
1125 | |
---|
1126 | if (rtems_rfs_rtems_trace (RTEMS_RFS_RTEMS_DEBUG_RENAME)) |
---|
1127 | printf ("rtems-rfs: rename: ino:%ld doff:%lu, new parent:%ld new name:%s\n", |
---|
1128 | ino, doff, new_parent, new_name); |
---|
1129 | |
---|
1130 | rtems_rfs_rtems_lock (fs); |
---|
1131 | |
---|
1132 | /* |
---|
1133 | * Link to the inode before unlinking so the inode is not erased when |
---|
1134 | * unlinked. |
---|
1135 | */ |
---|
1136 | rc = rtems_rfs_link (fs, new_name, strlen (new_name), new_parent, ino, true); |
---|
1137 | if (rc) |
---|
1138 | { |
---|
1139 | rtems_rfs_rtems_unlock (fs); |
---|
1140 | return rtems_rfs_rtems_error ("rename: linking", rc); |
---|
1141 | } |
---|
1142 | |
---|
1143 | /* |
---|
1144 | * Unlink all inodes even directories with the dir option as false because a |
---|
1145 | * directory may not be empty. |
---|
1146 | */ |
---|
1147 | rc = rtems_rfs_unlink (fs, old_parent, ino, doff, |
---|
1148 | rtems_rfs_unlink_dir_allowed); |
---|
1149 | if (rc) |
---|
1150 | { |
---|
1151 | rtems_rfs_rtems_unlock (fs); |
---|
1152 | return rtems_rfs_rtems_error ("rename: unlinking", rc); |
---|
1153 | } |
---|
1154 | |
---|
1155 | rtems_rfs_rtems_unlock (fs); |
---|
1156 | |
---|
1157 | return 0; |
---|
1158 | } |
---|
1159 | |
---|
1160 | /** |
---|
1161 | * Return the file system stat data. |
---|
1162 | * |
---|
1163 | * @param pathloc |
---|
1164 | * @param sb |
---|
1165 | * @return int |
---|
1166 | */ |
---|
1167 | int |
---|
1168 | rtems_rfs_rtems_statvfs (rtems_filesystem_location_info_t* pathloc, |
---|
1169 | struct statvfs* sb) |
---|
1170 | { |
---|
1171 | rtems_rfs_file_system* fs = rtems_rfs_rtems_pathloc_dev (pathloc); |
---|
1172 | size_t blocks; |
---|
1173 | size_t inodes; |
---|
1174 | |
---|
1175 | rtems_rfs_group_usage (fs, &blocks, &inodes); |
---|
1176 | |
---|
1177 | sb->f_bsize = rtems_rfs_fs_block_size (fs); |
---|
1178 | sb->f_frsize = rtems_rfs_fs_media_block_size (fs); |
---|
1179 | sb->f_blocks = rtems_rfs_fs_media_blocks (fs); |
---|
1180 | sb->f_bfree = rtems_rfs_fs_blocks (fs) - blocks; |
---|
1181 | sb->f_bavail = sb->f_bfree; |
---|
1182 | sb->f_files = rtems_rfs_fs_inodes (fs); |
---|
1183 | sb->f_ffree = rtems_rfs_fs_inodes (fs) - inodes; |
---|
1184 | sb->f_favail = sb->f_ffree; |
---|
1185 | sb->f_fsid = RTEMS_RFS_SB_MAGIC; |
---|
1186 | sb->f_flag = rtems_rfs_fs_flags (fs); |
---|
1187 | sb->f_namemax = rtems_rfs_fs_max_name (fs); |
---|
1188 | |
---|
1189 | return 0; |
---|
1190 | } |
---|
1191 | |
---|
1192 | /** |
---|
1193 | * Handler table for RFS link nodes |
---|
1194 | */ |
---|
1195 | const rtems_filesystem_file_handlers_r rtems_rfs_rtems_link_handlers = |
---|
1196 | { |
---|
1197 | .open_h = NULL, |
---|
1198 | .close_h = NULL, |
---|
1199 | .read_h = NULL, |
---|
1200 | .write_h = NULL, |
---|
1201 | .ioctl_h = NULL, |
---|
1202 | .lseek_h = NULL, |
---|
1203 | .fstat_h = rtems_rfs_rtems_stat, |
---|
1204 | .fchmod_h = NULL, |
---|
1205 | .ftruncate_h = NULL, |
---|
1206 | .fpathconf_h = NULL, |
---|
1207 | .fsync_h = NULL, |
---|
1208 | .fdatasync_h = NULL, |
---|
1209 | .fcntl_h = NULL, |
---|
1210 | .rmnod_h = rtems_rfs_rtems_rmnod |
---|
1211 | }; |
---|
1212 | |
---|
1213 | /** |
---|
1214 | * Forward decl for the ops table. |
---|
1215 | */ |
---|
1216 | |
---|
1217 | int rtems_rfs_rtems_initialise (rtems_filesystem_mount_table_entry_t *mt_entry); |
---|
1218 | int rtems_rfs_rtems_shutdown (rtems_filesystem_mount_table_entry_t *mt_entry); |
---|
1219 | |
---|
1220 | /** |
---|
1221 | * RFS file system operations table. |
---|
1222 | */ |
---|
1223 | const rtems_filesystem_operations_table rtems_rfs_ops = |
---|
1224 | { |
---|
1225 | .evalpath_h = rtems_rfs_rtems_eval_path, |
---|
1226 | .evalformake_h = rtems_rfs_rtems_eval_for_make, |
---|
1227 | .link_h = rtems_rfs_rtems_link, |
---|
1228 | .unlink_h = rtems_rfs_rtems_unlink, |
---|
1229 | .node_type_h = rtems_rfs_rtems_node_type, |
---|
1230 | .mknod_h = rtems_rfs_rtems_mknod, |
---|
1231 | .chown_h = rtems_rfs_rtems_chown, |
---|
1232 | .freenod_h = rtems_rfs_rtems_freenodinfo, |
---|
1233 | .mount_h = NULL, |
---|
1234 | .fsmount_me_h = rtems_rfs_rtems_initialise, |
---|
1235 | .unmount_h = NULL, |
---|
1236 | .fsunmount_me_h = rtems_rfs_rtems_shutdown, |
---|
1237 | .utime_h = rtems_rfs_rtems_utime, |
---|
1238 | .eval_link_h = NULL, /* never called cause we lie in the node type */ |
---|
1239 | .symlink_h = rtems_rfs_rtems_symlink, |
---|
1240 | .readlink_h = rtems_rfs_rtems_readlink, |
---|
1241 | .rename_h = rtems_rfs_rtems_rename, |
---|
1242 | .statvfs_h = rtems_rfs_rtems_statvfs |
---|
1243 | }; |
---|
1244 | |
---|
1245 | /** |
---|
1246 | * Open the file system. |
---|
1247 | */ |
---|
1248 | |
---|
1249 | int |
---|
1250 | rtems_rfs_rtems_initialise (rtems_filesystem_mount_table_entry_t* mt_entry) |
---|
1251 | { |
---|
1252 | rtems_rfs_rtems_private* rtems; |
---|
1253 | rtems_rfs_file_system* fs; |
---|
1254 | int rc; |
---|
1255 | |
---|
1256 | rtems = malloc (sizeof (rtems_rfs_rtems_private)); |
---|
1257 | if (!rtems) |
---|
1258 | return rtems_rfs_rtems_error ("initialise: local data", ENOMEM); |
---|
1259 | |
---|
1260 | memset (rtems, 0, sizeof (rtems_rfs_rtems_private)); |
---|
1261 | |
---|
1262 | rc = rtems_rfs_mutex_create (&rtems->access); |
---|
1263 | if (rc > 0) |
---|
1264 | { |
---|
1265 | free (rtems); |
---|
1266 | return rtems_rfs_rtems_error ("initialise: cannot create mutex", rc); |
---|
1267 | } |
---|
1268 | |
---|
1269 | rc = rtems_rfs_mutex_lock (&rtems->access); |
---|
1270 | if (rc > 0) |
---|
1271 | { |
---|
1272 | rtems_rfs_mutex_destroy (&rtems->access); |
---|
1273 | free (rtems); |
---|
1274 | return rtems_rfs_rtems_error ("initialise: cannot lock access mutex", rc); |
---|
1275 | } |
---|
1276 | |
---|
1277 | rc = rtems_rfs_fs_open (mt_entry->dev, rtems, 0, &fs); |
---|
1278 | if (rc) |
---|
1279 | { |
---|
1280 | free (rtems); |
---|
1281 | return rtems_rfs_rtems_error ("initialise: open", rc); |
---|
1282 | } |
---|
1283 | |
---|
1284 | mt_entry->fs_info = fs; |
---|
1285 | |
---|
1286 | mt_entry->mt_fs_root.node_access = (void*) RTEMS_RFS_ROOT_INO; |
---|
1287 | mt_entry->mt_fs_root.handlers = &rtems_rfs_rtems_dir_handlers; |
---|
1288 | mt_entry->mt_fs_root.ops = &rtems_rfs_ops; |
---|
1289 | |
---|
1290 | rtems_rfs_rtems_unlock (fs); |
---|
1291 | |
---|
1292 | return 0; |
---|
1293 | } |
---|
1294 | |
---|
1295 | /** |
---|
1296 | * Shutdown the file system. |
---|
1297 | */ |
---|
1298 | int |
---|
1299 | rtems_rfs_rtems_shutdown (rtems_filesystem_mount_table_entry_t* mt_entry) |
---|
1300 | { |
---|
1301 | rtems_rfs_file_system* fs = mt_entry->fs_info; |
---|
1302 | rtems_rfs_rtems_private* rtems; |
---|
1303 | int rc; |
---|
1304 | |
---|
1305 | rtems = rtems_rfs_fs_user (fs); |
---|
1306 | |
---|
1307 | rc = rtems_rfs_fs_close(fs); |
---|
1308 | |
---|
1309 | rtems_rfs_mutex_destroy (&rtems->access); |
---|
1310 | free (rtems); |
---|
1311 | |
---|
1312 | return rtems_rfs_rtems_error ("shutdown: close", rc); |
---|
1313 | } |
---|