1 | /** |
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2 | * @file |
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3 | * |
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4 | * @brief RTEMS File System Interface for RTEMS |
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5 | * @ingroup rtems_rfs |
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6 | */ |
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7 | |
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8 | /* |
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9 | * COPYRIGHT (c) 2010 Chris Johns <chrisj@rtems.org> |
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10 | * |
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11 | * Modifications to support reference counting in the file system are |
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12 | * Copyright (c) 2012 embedded brains GmbH. |
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13 | * |
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14 | * The license and distribution terms for this file may be |
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15 | * found in the file LICENSE in this distribution or at |
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16 | * http://www.rtems.org/license/LICENSE. |
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17 | */ |
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18 | |
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19 | #if HAVE_CONFIG_H |
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20 | #include "config.h" |
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21 | #endif |
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22 | |
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23 | #include <sys/param.h> |
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24 | #include <inttypes.h> |
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25 | #include <string.h> |
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26 | #include <stdlib.h> |
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27 | |
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28 | #include <rtems/inttypes.h> |
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29 | |
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30 | #include <rtems/rfs/rtems-rfs-file.h> |
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31 | #include <rtems/rfs/rtems-rfs-dir.h> |
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32 | #include <rtems/rfs/rtems-rfs-link.h> |
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33 | #include "rtems-rfs-rtems.h" |
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34 | |
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35 | static bool |
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36 | rtems_rfs_rtems_eval_perms (rtems_filesystem_eval_path_context_t *ctx, |
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37 | int eval_flags, |
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38 | rtems_rfs_inode_handle* inode) |
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39 | { |
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40 | return rtems_filesystem_eval_path_check_access( |
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41 | ctx, |
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42 | eval_flags, |
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43 | rtems_rfs_inode_get_mode (inode), |
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44 | rtems_rfs_inode_get_uid (inode), |
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45 | rtems_rfs_inode_get_gid (inode) |
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46 | ); |
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47 | } |
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48 | |
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49 | static void |
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50 | rtems_rfs_rtems_lock_by_mt_entry ( |
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51 | const rtems_filesystem_mount_table_entry_t *mt_entry |
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52 | ) |
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53 | { |
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54 | rtems_rfs_file_system* fs = mt_entry->fs_info; |
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55 | |
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56 | rtems_rfs_rtems_lock (fs); |
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57 | } |
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58 | |
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59 | static void |
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60 | rtems_rfs_rtems_unlock_by_mt_entry ( |
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61 | const rtems_filesystem_mount_table_entry_t *mt_entry |
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62 | ) |
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63 | { |
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64 | rtems_rfs_file_system* fs = mt_entry->fs_info; |
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65 | |
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66 | rtems_rfs_rtems_unlock (fs); |
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67 | } |
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68 | |
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69 | static bool |
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70 | rtems_rfs_rtems_is_directory( |
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71 | rtems_filesystem_eval_path_context_t *ctx, |
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72 | void *arg |
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73 | ) |
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74 | { |
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75 | rtems_rfs_inode_handle* inode = arg; |
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76 | |
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77 | return S_ISDIR (rtems_rfs_inode_get_mode (inode)); |
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78 | } |
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79 | |
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80 | static void rtems_rfs_rtems_follow_link( |
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81 | rtems_filesystem_eval_path_context_t* ctx, |
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82 | rtems_rfs_file_system* fs, |
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83 | rtems_rfs_ino ino |
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84 | ) |
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85 | { |
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86 | size_t len = MAXPATHLEN; |
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87 | char *link = malloc(len + 1); |
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88 | |
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89 | if (link != NULL) { |
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90 | int rc = rtems_rfs_symlink_read (fs, ino, link, len, &len); |
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91 | |
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92 | if (rc == 0) { |
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93 | rtems_filesystem_eval_path_recursive (ctx, link, len); |
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94 | } else { |
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95 | rtems_filesystem_eval_path_error (ctx, 0); |
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96 | } |
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97 | |
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98 | free(link); |
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99 | } else { |
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100 | rtems_filesystem_eval_path_error (ctx, ENOMEM); |
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101 | } |
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102 | } |
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103 | |
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104 | static rtems_filesystem_eval_path_generic_status |
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105 | rtems_rfs_rtems_eval_token( |
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106 | rtems_filesystem_eval_path_context_t *ctx, |
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107 | void *arg, |
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108 | const char *token, |
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109 | size_t tokenlen |
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110 | ) |
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111 | { |
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112 | rtems_filesystem_eval_path_generic_status status = |
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113 | RTEMS_FILESYSTEM_EVAL_PATH_GENERIC_DONE; |
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114 | rtems_rfs_inode_handle* inode = arg; |
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115 | bool access_ok = rtems_rfs_rtems_eval_perms (ctx, RTEMS_FS_PERMS_EXEC, inode); |
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116 | |
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117 | if (access_ok) { |
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118 | if (rtems_filesystem_is_current_directory (token, tokenlen)) { |
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119 | rtems_filesystem_eval_path_clear_token (ctx); |
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120 | } else { |
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121 | rtems_filesystem_location_info_t *currentloc = |
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122 | rtems_filesystem_eval_path_get_currentloc( ctx ); |
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123 | rtems_rfs_file_system* fs = rtems_rfs_rtems_pathloc_dev (currentloc); |
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124 | rtems_rfs_ino entry_ino; |
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125 | uint32_t entry_doff; |
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126 | int rc = rtems_rfs_dir_lookup_ino ( |
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127 | fs, |
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128 | inode, |
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129 | token, |
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130 | tokenlen, |
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131 | &entry_ino, |
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132 | &entry_doff |
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133 | ); |
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134 | |
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135 | if (rc == 0) { |
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136 | rc = rtems_rfs_inode_close (fs, inode); |
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137 | if (rc == 0) { |
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138 | rc = rtems_rfs_inode_open (fs, entry_ino, inode, true); |
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139 | } |
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140 | |
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141 | if (rc != 0) { |
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142 | /* |
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143 | * This prevents the rtems_rfs_inode_close() from doing something in |
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144 | * rtems_rfs_rtems_eval_path(). |
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145 | */ |
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146 | memset (inode, 0, sizeof(*inode)); |
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147 | } |
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148 | } else { |
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149 | status = RTEMS_FILESYSTEM_EVAL_PATH_GENERIC_NO_ENTRY; |
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150 | rc = -1; |
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151 | } |
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152 | |
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153 | if (rc == 0) { |
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154 | bool is_sym_link = S_ISLNK (rtems_rfs_inode_get_mode (inode)); |
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155 | int eval_flags = rtems_filesystem_eval_path_get_flags (ctx); |
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156 | bool follow_sym_link = (eval_flags & RTEMS_FS_FOLLOW_SYM_LINK) != 0; |
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157 | bool terminal = !rtems_filesystem_eval_path_has_path (ctx); |
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158 | |
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159 | rtems_filesystem_eval_path_clear_token (ctx); |
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160 | |
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161 | if (is_sym_link && (follow_sym_link || !terminal)) { |
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162 | rtems_rfs_rtems_follow_link (ctx, fs, entry_ino); |
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163 | } else { |
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164 | rc = rtems_rfs_rtems_set_handlers (currentloc, inode) ? 0 : EIO; |
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165 | if (rc == 0) { |
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166 | rtems_rfs_rtems_set_pathloc_ino (currentloc, entry_ino); |
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167 | rtems_rfs_rtems_set_pathloc_doff (currentloc, entry_doff); |
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168 | |
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169 | if (!terminal) { |
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170 | status = RTEMS_FILESYSTEM_EVAL_PATH_GENERIC_CONTINUE; |
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171 | } |
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172 | } else { |
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173 | rtems_filesystem_eval_path_error ( |
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174 | ctx, |
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175 | rtems_rfs_rtems_error ("eval_path: set handlers", rc) |
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176 | ); |
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177 | } |
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178 | } |
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179 | } |
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180 | } |
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181 | } |
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182 | |
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183 | return status; |
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184 | } |
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185 | |
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186 | static const rtems_filesystem_eval_path_generic_config |
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187 | rtems_rfs_rtems_eval_config = { |
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188 | .is_directory = rtems_rfs_rtems_is_directory, |
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189 | .eval_token = rtems_rfs_rtems_eval_token |
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190 | }; |
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191 | |
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192 | static void |
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193 | rtems_rfs_rtems_eval_path (rtems_filesystem_eval_path_context_t *ctx) |
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194 | { |
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195 | rtems_filesystem_location_info_t *currentloc = |
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196 | rtems_filesystem_eval_path_get_currentloc (ctx); |
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197 | rtems_rfs_file_system* fs = rtems_rfs_rtems_pathloc_dev (currentloc); |
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198 | rtems_rfs_ino ino = rtems_rfs_rtems_get_pathloc_ino (currentloc); |
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199 | rtems_rfs_inode_handle inode; |
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200 | int rc; |
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201 | |
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202 | rc = rtems_rfs_inode_open (fs, ino, &inode, true); |
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203 | if (rc == 0) { |
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204 | rtems_filesystem_eval_path_generic ( |
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205 | ctx, |
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206 | &inode, |
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207 | &rtems_rfs_rtems_eval_config |
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208 | ); |
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209 | rc = rtems_rfs_inode_close (fs, &inode); |
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210 | if (rc != 0) { |
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211 | rtems_filesystem_eval_path_error ( |
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212 | ctx, |
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213 | rtems_rfs_rtems_error ("eval_path: closing inode", rc) |
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214 | ); |
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215 | } |
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216 | } else { |
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217 | rtems_filesystem_eval_path_error ( |
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218 | ctx, |
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219 | rtems_rfs_rtems_error ("eval_path: opening inode", rc) |
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220 | ); |
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221 | } |
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222 | } |
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223 | |
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224 | /** |
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225 | * The following rouine creates a new link node under parent with the name |
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226 | * given in name. The link node is set to point to the node at targetloc. |
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227 | */ |
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228 | static int |
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229 | rtems_rfs_rtems_link (const rtems_filesystem_location_info_t *parentloc, |
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230 | const rtems_filesystem_location_info_t *targetloc, |
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231 | const char *name, |
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232 | size_t namelen) |
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233 | { |
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234 | rtems_rfs_file_system* fs = rtems_rfs_rtems_pathloc_dev (targetloc); |
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235 | rtems_rfs_ino target = rtems_rfs_rtems_get_pathloc_ino (targetloc); |
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236 | rtems_rfs_ino parent = rtems_rfs_rtems_get_pathloc_ino (parentloc); |
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237 | int rc; |
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238 | |
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239 | if (rtems_rfs_rtems_trace (RTEMS_RFS_RTEMS_DEBUG_LINK)) |
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240 | printf ("rtems-rfs-rtems: link: in: parent:%" PRId32 " target:%" PRId32 "\n", |
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241 | parent, target); |
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242 | |
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243 | rc = rtems_rfs_link (fs, name, namelen, parent, target, false); |
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244 | if (rc) |
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245 | { |
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246 | return rtems_rfs_rtems_error ("link: linking", rc); |
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247 | } |
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248 | |
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249 | |
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250 | return 0; |
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251 | } |
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252 | |
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253 | /** |
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254 | * This routine is the implementation of the chown() system call for the |
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255 | * RFS. |
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256 | * |
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257 | * @param pathloc |
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258 | * @param owner |
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259 | * @param group |
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260 | * return int |
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261 | */ |
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262 | |
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263 | static int |
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264 | rtems_rfs_rtems_chown (const rtems_filesystem_location_info_t *pathloc, |
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265 | uid_t owner, |
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266 | gid_t group) |
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267 | { |
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268 | rtems_rfs_file_system* fs = rtems_rfs_rtems_pathloc_dev (pathloc); |
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269 | rtems_rfs_ino ino = rtems_rfs_rtems_get_pathloc_ino (pathloc); |
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270 | rtems_rfs_inode_handle inode; |
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271 | int rc; |
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272 | |
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273 | if (rtems_rfs_rtems_trace (RTEMS_RFS_RTEMS_DEBUG_CHOWN)) |
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274 | printf ("rtems-rfs-rtems: chown: in: ino:%" PRId32 " uid:%d gid:%d\n", |
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275 | ino, owner, group); |
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276 | |
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277 | rc = rtems_rfs_inode_open (fs, ino, &inode, true); |
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278 | if (rc > 0) |
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279 | { |
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280 | return rtems_rfs_rtems_error ("chown: opening inode", rc); |
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281 | } |
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282 | |
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283 | rtems_rfs_inode_set_uid_gid (&inode, owner, group); |
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284 | |
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285 | rc = rtems_rfs_inode_close (fs, &inode); |
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286 | if (rc) |
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287 | { |
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288 | return rtems_rfs_rtems_error ("chown: closing inode", rc); |
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289 | } |
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290 | |
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291 | return 0; |
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292 | } |
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293 | |
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294 | /** |
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295 | * This routine is the implementation of the utime() system call for the |
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296 | * RFS. |
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297 | * |
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298 | * @param pathloc |
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299 | * @param atime |
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300 | * @param mtime |
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301 | * return int |
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302 | */ |
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303 | |
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304 | static int |
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305 | rtems_rfs_rtems_utime(const rtems_filesystem_location_info_t* pathloc, |
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306 | time_t atime, |
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307 | time_t mtime) |
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308 | { |
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309 | rtems_rfs_file_system* fs = rtems_rfs_rtems_pathloc_dev (pathloc); |
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310 | rtems_rfs_ino ino = rtems_rfs_rtems_get_pathloc_ino (pathloc); |
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311 | rtems_rfs_inode_handle inode; |
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312 | int rc; |
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313 | |
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314 | rc = rtems_rfs_inode_open (fs, ino, &inode, true); |
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315 | if (rc) |
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316 | { |
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317 | return rtems_rfs_rtems_error ("utime: read inode", rc); |
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318 | } |
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319 | |
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320 | rtems_rfs_inode_set_atime (&inode, atime); |
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321 | rtems_rfs_inode_set_mtime (&inode, mtime); |
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322 | |
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323 | rc = rtems_rfs_inode_close (fs, &inode); |
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324 | if (rc) |
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325 | { |
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326 | return rtems_rfs_rtems_error ("utime: closing inode", rc); |
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327 | } |
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328 | |
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329 | return 0; |
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330 | } |
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331 | |
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332 | /** |
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333 | * The following routine creates a new symbolic link node under parent with the |
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334 | * name given in node_name. |
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335 | */ |
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336 | |
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337 | static int |
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338 | rtems_rfs_rtems_symlink (const rtems_filesystem_location_info_t* parent_loc, |
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339 | const char* node_name, |
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340 | size_t node_name_len, |
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341 | const char* target) |
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342 | { |
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343 | rtems_rfs_file_system* fs = rtems_rfs_rtems_pathloc_dev (parent_loc); |
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344 | rtems_rfs_ino parent = rtems_rfs_rtems_get_pathloc_ino (parent_loc); |
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345 | int rc; |
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346 | |
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347 | rc = rtems_rfs_symlink (fs, node_name, node_name_len, |
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348 | target, strlen (target), |
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349 | geteuid(), getegid(), parent); |
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350 | if (rc) |
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351 | { |
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352 | return rtems_rfs_rtems_error ("symlink: linking", rc); |
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353 | } |
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354 | |
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355 | return 0; |
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356 | } |
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357 | |
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358 | /** |
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359 | * The following rouine puts the symblic links destination name into buf. |
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360 | */ |
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361 | |
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362 | static ssize_t |
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363 | rtems_rfs_rtems_readlink (const rtems_filesystem_location_info_t* pathloc, |
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364 | char* buf, |
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365 | size_t bufsize) |
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366 | { |
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367 | rtems_rfs_file_system* fs = rtems_rfs_rtems_pathloc_dev (pathloc); |
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368 | rtems_rfs_ino ino = rtems_rfs_rtems_get_pathloc_ino (pathloc); |
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369 | size_t length; |
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370 | int rc; |
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371 | |
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372 | if (rtems_rfs_rtems_trace (RTEMS_RFS_RTEMS_DEBUG_READLINK)) |
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373 | printf ("rtems-rfs-rtems: readlink: in: ino:%" PRId32 "\n", ino); |
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374 | |
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375 | rc = rtems_rfs_symlink_read (fs, ino, buf, bufsize, &length); |
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376 | if (rc) |
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377 | { |
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378 | return rtems_rfs_rtems_error ("readlink: reading link", rc); |
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379 | } |
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380 | |
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381 | return (ssize_t) length; |
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382 | } |
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383 | |
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384 | static int |
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385 | rtems_rfs_rtems_fchmod (const rtems_filesystem_location_info_t* pathloc, |
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386 | mode_t mode) |
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387 | { |
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388 | rtems_rfs_file_system* fs = rtems_rfs_rtems_pathloc_dev (pathloc); |
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389 | rtems_rfs_ino ino = rtems_rfs_rtems_get_pathloc_ino (pathloc); |
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390 | rtems_rfs_inode_handle inode; |
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391 | int rc; |
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392 | |
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393 | if (rtems_rfs_rtems_trace (RTEMS_RFS_RTEMS_DEBUG_FCHMOD)) |
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394 | printf ("rtems-rfs-rtems: fchmod: in: ino:%" PRId32 " mode:%06" PRIomode_t "\n", |
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395 | ino, mode); |
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396 | |
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397 | rc = rtems_rfs_inode_open (fs, ino, &inode, true); |
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398 | if (rc) |
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399 | { |
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400 | return rtems_rfs_rtems_error ("fchmod: opening inode", rc); |
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401 | } |
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402 | |
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403 | rtems_rfs_inode_set_mode (&inode, mode); |
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404 | |
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405 | rc = rtems_rfs_inode_close (fs, &inode); |
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406 | if (rc > 0) |
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407 | { |
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408 | return rtems_rfs_rtems_error ("fchmod: closing inode", rc); |
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409 | } |
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410 | |
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411 | return 0; |
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412 | } |
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413 | |
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414 | int |
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415 | rtems_rfs_rtems_fstat (const rtems_filesystem_location_info_t* pathloc, |
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416 | struct stat* buf) |
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417 | { |
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418 | rtems_rfs_file_system* fs = rtems_rfs_rtems_pathloc_dev (pathloc); |
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419 | rtems_rfs_ino ino = rtems_rfs_rtems_get_pathloc_ino (pathloc); |
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420 | rtems_rfs_inode_handle inode; |
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421 | rtems_rfs_file_shared* shared; |
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422 | uint16_t mode; |
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423 | int rc; |
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424 | |
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425 | if (rtems_rfs_rtems_trace (RTEMS_RFS_RTEMS_DEBUG_STAT)) |
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426 | printf ("rtems-rfs-rtems: stat: in: ino:%" PRId32 "\n", ino); |
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427 | |
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428 | rc = rtems_rfs_inode_open (fs, ino, &inode, true); |
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429 | if (rc) |
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430 | { |
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431 | return rtems_rfs_rtems_error ("stat: opening inode", rc); |
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432 | } |
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433 | |
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434 | mode = rtems_rfs_inode_get_mode (&inode); |
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435 | |
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436 | if (RTEMS_RFS_S_ISCHR (mode) || RTEMS_RFS_S_ISBLK (mode)) |
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437 | { |
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438 | buf->st_rdev = |
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439 | rtems_filesystem_make_dev_t (rtems_rfs_inode_get_block (&inode, 0), |
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440 | rtems_rfs_inode_get_block (&inode, 1)); |
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441 | } |
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442 | |
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443 | buf->st_dev = (dev_t) (uintptr_t)rtems_rfs_fs_device (fs); |
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444 | buf->st_ino = rtems_rfs_inode_ino (&inode); |
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445 | buf->st_mode = rtems_rfs_rtems_mode (mode); |
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446 | buf->st_nlink = rtems_rfs_inode_get_links (&inode); |
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447 | buf->st_uid = rtems_rfs_inode_get_uid (&inode); |
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448 | buf->st_gid = rtems_rfs_inode_get_gid (&inode); |
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449 | |
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450 | /* |
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451 | * Need to check is the ino is an open file. If so we take the values from |
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452 | * the open file rather than the inode. |
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453 | */ |
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454 | shared = rtems_rfs_file_get_shared (fs, rtems_rfs_inode_ino (&inode)); |
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455 | |
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456 | if (shared) |
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457 | { |
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458 | buf->st_atime = rtems_rfs_file_shared_get_atime (shared); |
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459 | buf->st_mtime = rtems_rfs_file_shared_get_mtime (shared); |
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460 | buf->st_ctime = rtems_rfs_file_shared_get_ctime (shared); |
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461 | buf->st_blocks = rtems_rfs_file_shared_get_block_count (shared); |
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462 | |
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463 | if (S_ISLNK (buf->st_mode)) |
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464 | buf->st_size = rtems_rfs_file_shared_get_block_offset (shared); |
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465 | else |
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466 | buf->st_size = rtems_rfs_file_shared_get_size (fs, shared); |
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467 | } |
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468 | else |
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469 | { |
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470 | buf->st_atime = rtems_rfs_inode_get_atime (&inode); |
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471 | buf->st_mtime = rtems_rfs_inode_get_mtime (&inode); |
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472 | buf->st_ctime = rtems_rfs_inode_get_ctime (&inode); |
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473 | buf->st_blocks = rtems_rfs_inode_get_block_count (&inode); |
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474 | |
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475 | if (S_ISLNK (buf->st_mode)) |
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476 | buf->st_size = rtems_rfs_inode_get_block_offset (&inode); |
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477 | else |
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478 | buf->st_size = rtems_rfs_inode_get_size (fs, &inode); |
---|
479 | } |
---|
480 | |
---|
481 | buf->st_blksize = rtems_rfs_fs_block_size (fs); |
---|
482 | |
---|
483 | rc = rtems_rfs_inode_close (fs, &inode); |
---|
484 | if (rc > 0) |
---|
485 | { |
---|
486 | return rtems_rfs_rtems_error ("stat: closing inode", rc); |
---|
487 | } |
---|
488 | |
---|
489 | return 0; |
---|
490 | } |
---|
491 | |
---|
492 | /** |
---|
493 | * Routine to create a node in the RFS file system. |
---|
494 | */ |
---|
495 | |
---|
496 | static int |
---|
497 | rtems_rfs_rtems_mknod (const rtems_filesystem_location_info_t *parentloc, |
---|
498 | const char *name, |
---|
499 | size_t namelen, |
---|
500 | mode_t mode, |
---|
501 | dev_t dev) |
---|
502 | { |
---|
503 | rtems_rfs_file_system* fs = rtems_rfs_rtems_pathloc_dev (parentloc); |
---|
504 | rtems_rfs_ino parent = rtems_rfs_rtems_get_pathloc_ino (parentloc); |
---|
505 | rtems_rfs_ino ino; |
---|
506 | rtems_rfs_inode_handle inode; |
---|
507 | uid_t uid; |
---|
508 | gid_t gid; |
---|
509 | int rc; |
---|
510 | |
---|
511 | uid = geteuid (); |
---|
512 | gid = getegid (); |
---|
513 | |
---|
514 | rc = rtems_rfs_inode_create (fs, parent, name, namelen, |
---|
515 | rtems_rfs_rtems_imode (mode), |
---|
516 | 1, uid, gid, &ino); |
---|
517 | if (rc > 0) |
---|
518 | { |
---|
519 | return rtems_rfs_rtems_error ("mknod: inode create", rc); |
---|
520 | } |
---|
521 | |
---|
522 | rc = rtems_rfs_inode_open (fs, ino, &inode, true); |
---|
523 | if (rc > 0) |
---|
524 | { |
---|
525 | return rtems_rfs_rtems_error ("mknod: inode open", rc); |
---|
526 | } |
---|
527 | |
---|
528 | if (S_ISDIR(mode) || S_ISREG(mode)) |
---|
529 | { |
---|
530 | } |
---|
531 | else if (S_ISCHR (mode) || S_ISBLK (mode)) |
---|
532 | { |
---|
533 | int major; |
---|
534 | int minor; |
---|
535 | rtems_filesystem_split_dev_t (dev, major, minor); |
---|
536 | rtems_rfs_inode_set_block (&inode, 0, major); |
---|
537 | rtems_rfs_inode_set_block (&inode, 1, minor); |
---|
538 | } |
---|
539 | else |
---|
540 | { |
---|
541 | rtems_rfs_inode_close (fs, &inode); |
---|
542 | return rtems_rfs_rtems_error ("mknod: bad mode", EINVAL); |
---|
543 | } |
---|
544 | |
---|
545 | rc = rtems_rfs_inode_close (fs, &inode); |
---|
546 | if (rc > 0) |
---|
547 | { |
---|
548 | return rtems_rfs_rtems_error ("mknod: closing inode", rc); |
---|
549 | } |
---|
550 | |
---|
551 | return 0; |
---|
552 | } |
---|
553 | |
---|
554 | /** |
---|
555 | * Routine to remove a node from the RFS file system. |
---|
556 | * |
---|
557 | * @param parent_pathloc |
---|
558 | * @param pathloc |
---|
559 | * @return int |
---|
560 | */ |
---|
561 | int |
---|
562 | rtems_rfs_rtems_rmnod (const rtems_filesystem_location_info_t* parent_pathloc, |
---|
563 | const rtems_filesystem_location_info_t* pathloc) |
---|
564 | { |
---|
565 | rtems_rfs_file_system* fs = rtems_rfs_rtems_pathloc_dev (pathloc); |
---|
566 | rtems_rfs_ino parent = rtems_rfs_rtems_get_pathloc_ino (parent_pathloc); |
---|
567 | rtems_rfs_ino ino = rtems_rfs_rtems_get_pathloc_ino (pathloc); |
---|
568 | uint32_t doff = rtems_rfs_rtems_get_pathloc_doff (pathloc); |
---|
569 | int rc; |
---|
570 | |
---|
571 | if (rtems_rfs_rtems_trace (RTEMS_RFS_RTEMS_DEBUG_RMNOD)) |
---|
572 | printf ("rtems-rfs: rmnod: parent:%" PRId32 " doff:%" PRIu32 ", ino:%" PRId32 "\n", |
---|
573 | parent, doff, ino); |
---|
574 | |
---|
575 | rc = rtems_rfs_unlink (fs, parent, ino, doff, rtems_rfs_unlink_dir_if_empty); |
---|
576 | if (rc) |
---|
577 | { |
---|
578 | return rtems_rfs_rtems_error ("rmnod: unlinking", rc); |
---|
579 | } |
---|
580 | |
---|
581 | return 0; |
---|
582 | } |
---|
583 | |
---|
584 | /** |
---|
585 | * The following routine does a sync on an inode node. Currently it flushes |
---|
586 | * everything related to this device. |
---|
587 | * |
---|
588 | * @param iop |
---|
589 | * @return int |
---|
590 | */ |
---|
591 | int |
---|
592 | rtems_rfs_rtems_fdatasync (rtems_libio_t* iop) |
---|
593 | { |
---|
594 | int rc; |
---|
595 | |
---|
596 | rc = rtems_rfs_buffer_sync (rtems_rfs_rtems_pathloc_dev (&iop->pathinfo)); |
---|
597 | if (rc) |
---|
598 | return rtems_rfs_rtems_error ("fdatasync: sync", rc); |
---|
599 | |
---|
600 | return 0; |
---|
601 | } |
---|
602 | |
---|
603 | /** |
---|
604 | * Rename the node. |
---|
605 | */ |
---|
606 | static int |
---|
607 | rtems_rfs_rtems_rename(const rtems_filesystem_location_info_t* old_parent_loc, |
---|
608 | const rtems_filesystem_location_info_t* old_loc, |
---|
609 | const rtems_filesystem_location_info_t* new_parent_loc, |
---|
610 | const char* new_name, |
---|
611 | size_t new_name_len) |
---|
612 | { |
---|
613 | rtems_rfs_file_system* fs = rtems_rfs_rtems_pathloc_dev (old_loc); |
---|
614 | rtems_rfs_ino old_parent; |
---|
615 | rtems_rfs_ino new_parent; |
---|
616 | rtems_rfs_ino ino; |
---|
617 | uint32_t doff; |
---|
618 | int rc; |
---|
619 | |
---|
620 | old_parent = rtems_rfs_rtems_get_pathloc_ino (old_parent_loc); |
---|
621 | new_parent = rtems_rfs_rtems_get_pathloc_ino (new_parent_loc); |
---|
622 | |
---|
623 | ino = rtems_rfs_rtems_get_pathloc_ino (old_loc); |
---|
624 | doff = rtems_rfs_rtems_get_pathloc_doff (old_loc); |
---|
625 | |
---|
626 | if (rtems_rfs_rtems_trace (RTEMS_RFS_RTEMS_DEBUG_RENAME)) |
---|
627 | printf ("rtems-rfs: rename: ino:%" PRId32 " doff:%" PRIu32 ", new parent:%" PRId32 "\n", |
---|
628 | ino, doff, new_parent); |
---|
629 | |
---|
630 | /* |
---|
631 | * Link to the inode before unlinking so the inode is not erased when |
---|
632 | * unlinked. |
---|
633 | */ |
---|
634 | rc = rtems_rfs_link (fs, new_name, new_name_len, new_parent, ino, true); |
---|
635 | if (rc) |
---|
636 | { |
---|
637 | return rtems_rfs_rtems_error ("rename: linking", rc); |
---|
638 | } |
---|
639 | |
---|
640 | /* |
---|
641 | * Unlink all inodes even directories with the dir option as false because a |
---|
642 | * directory may not be empty. |
---|
643 | */ |
---|
644 | rc = rtems_rfs_unlink (fs, old_parent, ino, doff, |
---|
645 | rtems_rfs_unlink_dir_allowed); |
---|
646 | if (rc) |
---|
647 | { |
---|
648 | return rtems_rfs_rtems_error ("rename: unlinking", rc); |
---|
649 | } |
---|
650 | |
---|
651 | return 0; |
---|
652 | } |
---|
653 | |
---|
654 | /** |
---|
655 | * Return the file system stat data. |
---|
656 | * |
---|
657 | * @param pathloc |
---|
658 | * @param sb |
---|
659 | * @return int |
---|
660 | */ |
---|
661 | static int |
---|
662 | rtems_rfs_rtems_statvfs ( |
---|
663 | const rtems_filesystem_location_info_t *__restrict pathloc, |
---|
664 | struct statvfs *__restrict sb) |
---|
665 | { |
---|
666 | rtems_rfs_file_system* fs = rtems_rfs_rtems_pathloc_dev (pathloc); |
---|
667 | size_t blocks; |
---|
668 | size_t inodes; |
---|
669 | |
---|
670 | rtems_rfs_group_usage (fs, &blocks, &inodes); |
---|
671 | |
---|
672 | sb->f_bsize = rtems_rfs_fs_block_size (fs); |
---|
673 | sb->f_frsize = rtems_rfs_fs_media_block_size (fs); |
---|
674 | sb->f_blocks = rtems_rfs_fs_media_blocks (fs); |
---|
675 | sb->f_bfree = rtems_rfs_fs_blocks (fs) - blocks - 1; /* do not count the superblock */ |
---|
676 | sb->f_bavail = sb->f_bfree; |
---|
677 | sb->f_files = rtems_rfs_fs_inodes (fs); |
---|
678 | sb->f_ffree = rtems_rfs_fs_inodes (fs) - inodes; |
---|
679 | sb->f_favail = sb->f_ffree; |
---|
680 | sb->f_fsid = RTEMS_RFS_SB_MAGIC; |
---|
681 | sb->f_flag = rtems_rfs_fs_flags (fs); |
---|
682 | sb->f_namemax = rtems_rfs_fs_max_name (fs); |
---|
683 | |
---|
684 | return 0; |
---|
685 | } |
---|
686 | |
---|
687 | /** |
---|
688 | * Handler table for RFS link nodes |
---|
689 | */ |
---|
690 | const rtems_filesystem_file_handlers_r rtems_rfs_rtems_link_handlers = |
---|
691 | { |
---|
692 | .open_h = rtems_filesystem_default_open, |
---|
693 | .close_h = rtems_filesystem_default_close, |
---|
694 | .read_h = rtems_filesystem_default_read, |
---|
695 | .write_h = rtems_filesystem_default_write, |
---|
696 | .ioctl_h = rtems_filesystem_default_ioctl, |
---|
697 | .lseek_h = rtems_filesystem_default_lseek, |
---|
698 | .fstat_h = rtems_rfs_rtems_fstat, |
---|
699 | .ftruncate_h = rtems_filesystem_default_ftruncate, |
---|
700 | .fsync_h = rtems_filesystem_default_fsync_or_fdatasync, |
---|
701 | .fdatasync_h = rtems_filesystem_default_fsync_or_fdatasync, |
---|
702 | .fcntl_h = rtems_filesystem_default_fcntl, |
---|
703 | .kqfilter_h = rtems_filesystem_default_kqfilter, |
---|
704 | .mmap_h = rtems_filesystem_default_mmap, |
---|
705 | .poll_h = rtems_filesystem_default_poll, |
---|
706 | .readv_h = rtems_filesystem_default_readv, |
---|
707 | .writev_h = rtems_filesystem_default_writev |
---|
708 | }; |
---|
709 | |
---|
710 | /** |
---|
711 | * Forward decl for the ops table. |
---|
712 | */ |
---|
713 | |
---|
714 | int rtems_rfs_rtems_initialise (rtems_filesystem_mount_table_entry_t *mt_entry, |
---|
715 | const void *data); |
---|
716 | void rtems_rfs_rtems_shutdown (rtems_filesystem_mount_table_entry_t *mt_entry); |
---|
717 | |
---|
718 | /** |
---|
719 | * RFS file system operations table. |
---|
720 | */ |
---|
721 | const rtems_filesystem_operations_table rtems_rfs_ops = |
---|
722 | { |
---|
723 | .lock_h = rtems_rfs_rtems_lock_by_mt_entry, |
---|
724 | .unlock_h = rtems_rfs_rtems_unlock_by_mt_entry, |
---|
725 | .are_nodes_equal_h = rtems_filesystem_default_are_nodes_equal, |
---|
726 | .eval_path_h = rtems_rfs_rtems_eval_path, |
---|
727 | .link_h = rtems_rfs_rtems_link, |
---|
728 | .fchmod_h = rtems_rfs_rtems_fchmod, |
---|
729 | .mknod_h = rtems_rfs_rtems_mknod, |
---|
730 | .rmnod_h = rtems_rfs_rtems_rmnod, |
---|
731 | .chown_h = rtems_rfs_rtems_chown, |
---|
732 | .clonenod_h = rtems_filesystem_default_clonenode, |
---|
733 | .freenod_h = rtems_filesystem_default_freenode, |
---|
734 | .mount_h = rtems_filesystem_default_mount, |
---|
735 | .unmount_h = rtems_filesystem_default_unmount, |
---|
736 | .fsunmount_me_h = rtems_rfs_rtems_shutdown, |
---|
737 | .utime_h = rtems_rfs_rtems_utime, |
---|
738 | .symlink_h = rtems_rfs_rtems_symlink, |
---|
739 | .readlink_h = rtems_rfs_rtems_readlink, |
---|
740 | .rename_h = rtems_rfs_rtems_rename, |
---|
741 | .statvfs_h = rtems_rfs_rtems_statvfs |
---|
742 | }; |
---|
743 | |
---|
744 | /** |
---|
745 | * Open the file system. |
---|
746 | */ |
---|
747 | |
---|
748 | int |
---|
749 | rtems_rfs_rtems_initialise (rtems_filesystem_mount_table_entry_t* mt_entry, |
---|
750 | const void* data) |
---|
751 | { |
---|
752 | rtems_rfs_rtems_private* rtems; |
---|
753 | rtems_rfs_file_system* fs; |
---|
754 | uint32_t flags = 0; |
---|
755 | uint32_t max_held_buffers = RTEMS_RFS_FS_MAX_HELD_BUFFERS; |
---|
756 | const char* options = data; |
---|
757 | int rc; |
---|
758 | |
---|
759 | /* |
---|
760 | * Parse the options the user specifiies. |
---|
761 | */ |
---|
762 | while (options) |
---|
763 | { |
---|
764 | printf ("options=%s\n", options); |
---|
765 | if (strncmp (options, "hold-bitmaps", |
---|
766 | sizeof ("hold-bitmaps") - 1) == 0) |
---|
767 | flags |= RTEMS_RFS_FS_BITMAPS_HOLD; |
---|
768 | else if (strncmp (options, "no-local-cache", |
---|
769 | sizeof ("no-local-cache") - 1) == 0) |
---|
770 | flags |= RTEMS_RFS_FS_NO_LOCAL_CACHE; |
---|
771 | else if (strncmp (options, "max-held-bufs", |
---|
772 | sizeof ("max-held-bufs") - 1) == 0) |
---|
773 | { |
---|
774 | max_held_buffers = strtoul (options + sizeof ("max-held-bufs"), 0, 0); |
---|
775 | } |
---|
776 | else |
---|
777 | return rtems_rfs_rtems_error ("initialise: invalid option", EINVAL); |
---|
778 | |
---|
779 | options = strchr (options, ','); |
---|
780 | if (options) |
---|
781 | { |
---|
782 | ++options; |
---|
783 | if (*options == '\0') |
---|
784 | options = NULL; |
---|
785 | } |
---|
786 | } |
---|
787 | |
---|
788 | rtems = malloc (sizeof (rtems_rfs_rtems_private)); |
---|
789 | if (!rtems) |
---|
790 | return rtems_rfs_rtems_error ("initialise: local data", ENOMEM); |
---|
791 | |
---|
792 | memset (rtems, 0, sizeof (rtems_rfs_rtems_private)); |
---|
793 | |
---|
794 | rc = rtems_rfs_mutex_create (&rtems->access); |
---|
795 | if (rc > 0) |
---|
796 | { |
---|
797 | free (rtems); |
---|
798 | return rtems_rfs_rtems_error ("initialise: cannot create mutex", rc); |
---|
799 | } |
---|
800 | |
---|
801 | rc = rtems_rfs_mutex_lock (&rtems->access); |
---|
802 | if (rc > 0) |
---|
803 | { |
---|
804 | rtems_rfs_mutex_destroy (&rtems->access); |
---|
805 | free (rtems); |
---|
806 | return rtems_rfs_rtems_error ("initialise: cannot lock access mutex", rc); |
---|
807 | } |
---|
808 | |
---|
809 | rc = rtems_rfs_fs_open (mt_entry->dev, rtems, flags, max_held_buffers, &fs); |
---|
810 | if (rc) |
---|
811 | { |
---|
812 | rtems_rfs_mutex_unlock (&rtems->access); |
---|
813 | rtems_rfs_mutex_destroy (&rtems->access); |
---|
814 | free (rtems); |
---|
815 | return rtems_rfs_rtems_error ("initialise: open", errno); |
---|
816 | } |
---|
817 | |
---|
818 | mt_entry->fs_info = fs; |
---|
819 | mt_entry->ops = &rtems_rfs_ops; |
---|
820 | mt_entry->mt_fs_root->location.node_access = (void*) RTEMS_RFS_ROOT_INO; |
---|
821 | mt_entry->mt_fs_root->location.handlers = &rtems_rfs_rtems_dir_handlers; |
---|
822 | |
---|
823 | rtems_rfs_rtems_unlock (fs); |
---|
824 | |
---|
825 | return 0; |
---|
826 | } |
---|
827 | |
---|
828 | /** |
---|
829 | * Shutdown the file system. |
---|
830 | */ |
---|
831 | void |
---|
832 | rtems_rfs_rtems_shutdown (rtems_filesystem_mount_table_entry_t* mt_entry) |
---|
833 | { |
---|
834 | rtems_rfs_file_system* fs = mt_entry->fs_info; |
---|
835 | rtems_rfs_rtems_private* rtems; |
---|
836 | |
---|
837 | rtems = rtems_rfs_fs_user (fs); |
---|
838 | |
---|
839 | /* FIXME: Return value? */ |
---|
840 | rtems_rfs_fs_close(fs); |
---|
841 | |
---|
842 | rtems_rfs_mutex_destroy (&rtems->access); |
---|
843 | free (rtems); |
---|
844 | } |
---|