1 | /* |
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2 | * COPYRIGHT (c) 2010 Chris Johns <chrisj@rtems.org> |
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3 | * |
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4 | * Modifications to support reference counting in the file system are |
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5 | * Copyright (c) 2012 embedded brains GmbH. |
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6 | * |
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7 | * The license and distribution terms for this file may be |
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8 | * found in the file LICENSE in this distribution or at |
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9 | * http://www.rtems.com/license/LICENSE. |
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10 | */ |
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11 | /** |
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12 | * @file |
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13 | * |
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14 | * @ingroup rtems-rfs |
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15 | * |
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16 | * RTEMS File System Interface for RTEMS. |
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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 <inttypes.h> |
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24 | #include <stdlib.h> |
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25 | |
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26 | #if SIZEOF_MODE_T == 8 |
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27 | #define PRIomode_t PRIo64 |
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28 | #elif SIZEOF_MODE_T == 4 |
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29 | #define PRIomode_t PRIo32 |
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30 | #else |
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31 | #error "unsupport size of mode_t" |
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32 | #endif |
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33 | |
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34 | #include <rtems/rfs/rtems-rfs-file.h> |
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35 | #include <rtems/rfs/rtems-rfs-dir.h> |
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36 | #include <rtems/rfs/rtems-rfs-link.h> |
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37 | #include "rtems-rfs-rtems.h" |
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38 | |
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39 | static bool |
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40 | rtems_rfs_rtems_eval_perms (rtems_filesystem_eval_path_context_t *ctx, |
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41 | int eval_flags, |
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42 | rtems_rfs_inode_handle* inode) |
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43 | { |
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44 | return rtems_filesystem_eval_path_check_access( |
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45 | ctx, |
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46 | eval_flags, |
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47 | rtems_rfs_inode_get_mode (inode), |
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48 | rtems_rfs_inode_get_uid (inode), |
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49 | rtems_rfs_inode_get_gid (inode) |
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50 | ); |
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51 | } |
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52 | |
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53 | static rtems_filesystem_node_types_t |
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54 | rtems_rfs_rtems_node_type_by_inode (rtems_rfs_inode_handle* inode) |
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55 | { |
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56 | /* |
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57 | * Do not return RTEMS_FILESYSTEM_HARD_LINK because this would result in an |
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58 | * eval link which does not make sense in the case of the RFS file |
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59 | * system. All directory entries are links to an inode. A link such as a HARD |
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60 | * link is actually the normal path to a regular file, directory, device |
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61 | * etc's inode. Links to inodes can be considered "the real" one, yet they |
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62 | * are all links. |
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63 | */ |
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64 | uint16_t mode = rtems_rfs_inode_get_mode (inode); |
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65 | if (RTEMS_RFS_S_ISDIR (mode)) |
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66 | return RTEMS_FILESYSTEM_DIRECTORY; |
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67 | else if (RTEMS_RFS_S_ISLNK (mode)) |
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68 | return RTEMS_FILESYSTEM_SYM_LINK; |
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69 | else if (RTEMS_RFS_S_ISBLK (mode) || RTEMS_RFS_S_ISCHR (mode)) |
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70 | return RTEMS_FILESYSTEM_DEVICE; |
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71 | else |
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72 | return RTEMS_FILESYSTEM_MEMORY_FILE; |
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73 | } |
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74 | |
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75 | static void |
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76 | rtems_rfs_rtems_lock_by_mt_entry ( |
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77 | const rtems_filesystem_mount_table_entry_t *mt_entry |
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78 | ) |
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79 | { |
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80 | rtems_rfs_file_system* fs = mt_entry->fs_info; |
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81 | |
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82 | rtems_rfs_rtems_lock (fs); |
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83 | } |
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84 | |
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85 | static void |
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86 | rtems_rfs_rtems_unlock_by_mt_entry ( |
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87 | const rtems_filesystem_mount_table_entry_t *mt_entry |
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88 | ) |
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89 | { |
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90 | rtems_rfs_file_system* fs = mt_entry->fs_info; |
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91 | |
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92 | rtems_rfs_rtems_unlock (fs); |
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93 | } |
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94 | |
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95 | static bool |
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96 | rtems_rfs_rtems_is_directory( |
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97 | rtems_filesystem_eval_path_context_t *ctx, |
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98 | void *arg |
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99 | ) |
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100 | { |
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101 | rtems_rfs_inode_handle* inode = arg; |
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102 | |
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103 | return rtems_rfs_rtems_node_type_by_inode (inode) |
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104 | == RTEMS_FILESYSTEM_DIRECTORY; |
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105 | } |
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106 | |
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107 | static void rtems_rfs_rtems_follow_link( |
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108 | rtems_filesystem_eval_path_context_t* ctx, |
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109 | rtems_rfs_file_system* fs, |
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110 | rtems_rfs_ino ino |
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111 | ) |
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112 | { |
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113 | size_t len = MAXPATHLEN; |
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114 | char *link = malloc(len + 1); |
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115 | |
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116 | if (link != NULL) { |
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117 | int rc = rtems_rfs_symlink_read (fs, ino, link, len, &len); |
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118 | |
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119 | if (rc == 0) { |
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120 | rtems_filesystem_eval_path_recursive (ctx, link, len); |
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121 | } else { |
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122 | rtems_filesystem_eval_path_error (ctx, 0); |
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123 | } |
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124 | |
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125 | free(link); |
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126 | } else { |
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127 | rtems_filesystem_eval_path_error (ctx, ENOMEM); |
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128 | } |
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129 | } |
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130 | |
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131 | static rtems_filesystem_eval_path_generic_status |
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132 | rtems_rfs_rtems_eval_token( |
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133 | rtems_filesystem_eval_path_context_t *ctx, |
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134 | void *arg, |
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135 | const char *token, |
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136 | size_t tokenlen |
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137 | ) |
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138 | { |
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139 | rtems_filesystem_eval_path_generic_status status = |
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140 | RTEMS_FILESYSTEM_EVAL_PATH_GENERIC_DONE; |
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141 | rtems_rfs_inode_handle* inode = arg; |
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142 | bool access_ok = rtems_rfs_rtems_eval_perms (ctx, RTEMS_FS_PERMS_EXEC, inode); |
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143 | |
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144 | if (access_ok) { |
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145 | if (rtems_filesystem_is_current_directory (token, tokenlen)) { |
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146 | rtems_filesystem_eval_path_clear_token (ctx); |
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147 | } else { |
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148 | rtems_filesystem_location_info_t *currentloc = |
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149 | rtems_filesystem_eval_path_get_currentloc( ctx ); |
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150 | rtems_rfs_file_system* fs = rtems_rfs_rtems_pathloc_dev (currentloc); |
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151 | rtems_rfs_ino entry_ino; |
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152 | uint32_t entry_doff; |
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153 | int rc = rtems_rfs_dir_lookup_ino ( |
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154 | fs, |
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155 | inode, |
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156 | token, |
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157 | tokenlen, |
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158 | &entry_ino, |
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159 | &entry_doff |
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160 | ); |
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161 | |
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162 | if (rc == 0) { |
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163 | rc = rtems_rfs_inode_close (fs, inode); |
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164 | if (rc == 0) { |
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165 | rc = rtems_rfs_inode_open (fs, entry_ino, inode, true); |
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166 | } |
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167 | |
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168 | if (rc != 0) { |
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169 | /* |
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170 | * This prevents the rtems_rfs_inode_close() from doing something in |
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171 | * rtems_rfs_rtems_eval_path(). |
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172 | */ |
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173 | memset (inode, 0, sizeof(*inode)); |
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174 | } |
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175 | } else { |
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176 | status = RTEMS_FILESYSTEM_EVAL_PATH_GENERIC_NO_ENTRY; |
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177 | rc = -1; |
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178 | } |
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179 | |
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180 | if (rc == 0) { |
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181 | bool is_sym_link = rtems_rfs_rtems_node_type_by_inode (inode) |
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182 | == RTEMS_FILESYSTEM_SYM_LINK; |
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183 | int eval_flags = rtems_filesystem_eval_path_get_flags (ctx); |
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184 | bool follow_sym_link = (eval_flags & RTEMS_FS_FOLLOW_SYM_LINK) != 0; |
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185 | bool terminal = !rtems_filesystem_eval_path_has_path (ctx); |
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186 | |
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187 | rtems_filesystem_eval_path_clear_token (ctx); |
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188 | |
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189 | if (is_sym_link && (follow_sym_link || !terminal)) { |
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190 | rtems_rfs_rtems_follow_link (ctx, fs, entry_ino); |
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191 | } else { |
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192 | rc = rtems_rfs_rtems_set_handlers (currentloc, inode) ? 0 : EIO; |
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193 | if (rc == 0) { |
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194 | rtems_rfs_rtems_set_pathloc_ino (currentloc, entry_ino); |
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195 | rtems_rfs_rtems_set_pathloc_doff (currentloc, entry_doff); |
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196 | |
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197 | if (!terminal) { |
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198 | status = RTEMS_FILESYSTEM_EVAL_PATH_GENERIC_CONTINUE; |
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199 | } |
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200 | } else { |
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201 | rtems_filesystem_eval_path_error ( |
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202 | ctx, |
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203 | rtems_rfs_rtems_error ("eval_path: set handlers", rc) |
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204 | ); |
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205 | } |
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206 | } |
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207 | } |
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208 | } |
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209 | } |
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210 | |
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211 | return status; |
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212 | } |
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213 | |
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214 | static const rtems_filesystem_eval_path_generic_config |
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215 | rtems_rfs_rtems_eval_config = { |
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216 | .is_directory = rtems_rfs_rtems_is_directory, |
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217 | .eval_token = rtems_rfs_rtems_eval_token |
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218 | }; |
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219 | |
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220 | static void |
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221 | rtems_rfs_rtems_eval_path (rtems_filesystem_eval_path_context_t *ctx) |
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222 | { |
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223 | rtems_filesystem_location_info_t *currentloc = |
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224 | rtems_filesystem_eval_path_get_currentloc (ctx); |
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225 | rtems_rfs_file_system* fs = rtems_rfs_rtems_pathloc_dev (currentloc); |
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226 | rtems_rfs_ino ino = rtems_rfs_rtems_get_pathloc_ino (currentloc); |
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227 | rtems_rfs_inode_handle inode; |
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228 | int rc; |
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229 | |
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230 | rc = rtems_rfs_inode_open (fs, ino, &inode, true); |
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231 | if (rc == 0) { |
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232 | rtems_filesystem_eval_path_generic ( |
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233 | ctx, |
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234 | &inode, |
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235 | &rtems_rfs_rtems_eval_config |
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236 | ); |
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237 | rc = rtems_rfs_inode_close (fs, &inode); |
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238 | if (rc != 0) { |
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239 | rtems_filesystem_eval_path_error ( |
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240 | ctx, |
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241 | rtems_rfs_rtems_error ("eval_path: closing inode", rc) |
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242 | ); |
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243 | } |
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244 | } else { |
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245 | rtems_filesystem_eval_path_error ( |
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246 | ctx, |
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247 | rtems_rfs_rtems_error ("eval_path: opening inode", rc) |
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248 | ); |
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249 | } |
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250 | } |
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251 | |
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252 | /** |
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253 | * The following rouine creates a new link node under parent with the name |
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254 | * given in name. The link node is set to point to the node at targetloc. |
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255 | */ |
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256 | static int |
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257 | rtems_rfs_rtems_link (const rtems_filesystem_location_info_t *parentloc, |
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258 | const rtems_filesystem_location_info_t *targetloc, |
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259 | const char *name, |
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260 | size_t namelen) |
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261 | { |
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262 | rtems_rfs_file_system* fs = rtems_rfs_rtems_pathloc_dev (targetloc); |
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263 | rtems_rfs_ino target = rtems_rfs_rtems_get_pathloc_ino (targetloc); |
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264 | rtems_rfs_ino parent = rtems_rfs_rtems_get_pathloc_ino (parentloc); |
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265 | int rc; |
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266 | |
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267 | if (rtems_rfs_rtems_trace (RTEMS_RFS_RTEMS_DEBUG_LINK)) |
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268 | printf ("rtems-rfs-rtems: link: in: parent:%" PRId32 " target:%" PRId32 "\n", |
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269 | parent, target); |
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270 | |
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271 | rc = rtems_rfs_link (fs, name, namelen, parent, target, false); |
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272 | if (rc) |
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273 | { |
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274 | return rtems_rfs_rtems_error ("link: linking", rc); |
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275 | } |
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276 | |
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277 | |
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278 | return 0; |
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279 | } |
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280 | |
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281 | /** |
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282 | * The following verifies that and returns the type of node that the loc refers |
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283 | * to. |
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284 | * |
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285 | * @param pathloc |
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286 | * @return rtems_filesystem_node_types_t |
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287 | */ |
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288 | |
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289 | static rtems_filesystem_node_types_t |
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290 | rtems_rfs_rtems_node_type (const rtems_filesystem_location_info_t* pathloc) |
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291 | { |
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292 | rtems_rfs_file_system* fs = rtems_rfs_rtems_pathloc_dev (pathloc); |
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293 | rtems_rfs_ino ino = rtems_rfs_rtems_get_pathloc_ino (pathloc); |
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294 | rtems_filesystem_node_types_t type; |
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295 | rtems_rfs_inode_handle inode; |
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296 | int rc; |
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297 | |
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298 | rc = rtems_rfs_inode_open (fs, ino, &inode, true); |
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299 | if (rc > 0) |
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300 | { |
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301 | return rtems_rfs_rtems_error ("node_type: opening inode", rc); |
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302 | } |
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303 | |
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304 | type = rtems_rfs_rtems_node_type_by_inode (&inode); |
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305 | |
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306 | rc = rtems_rfs_inode_close (fs, &inode); |
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307 | if (rc > 0) |
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308 | { |
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309 | return rtems_rfs_rtems_error ("node_type: closing inode", rc); |
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310 | } |
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311 | |
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312 | return type; |
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313 | } |
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314 | |
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315 | /** |
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316 | * This routine is the implementation of the chown() system call for the |
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317 | * RFS. |
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318 | * |
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319 | * @param pathloc |
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320 | * @param owner |
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321 | * @param group |
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322 | * return int |
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323 | */ |
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324 | |
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325 | static int |
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326 | rtems_rfs_rtems_chown (const rtems_filesystem_location_info_t *pathloc, |
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327 | uid_t owner, |
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328 | gid_t group) |
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329 | { |
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330 | rtems_rfs_file_system* fs = rtems_rfs_rtems_pathloc_dev (pathloc); |
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331 | rtems_rfs_ino ino = rtems_rfs_rtems_get_pathloc_ino (pathloc); |
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332 | rtems_rfs_inode_handle inode; |
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333 | #if defined (RTEMS_POSIX_API) |
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334 | uid_t uid; |
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335 | #endif |
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336 | int rc; |
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337 | |
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338 | if (rtems_rfs_rtems_trace (RTEMS_RFS_RTEMS_DEBUG_CHOWN)) |
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339 | printf ("rtems-rfs-rtems: chown: in: ino:%" PRId32 " uid:%d gid:%d\n", |
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340 | ino, owner, group); |
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341 | |
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342 | rc = rtems_rfs_inode_open (fs, ino, &inode, true); |
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343 | if (rc > 0) |
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344 | { |
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345 | return rtems_rfs_rtems_error ("chown: opening inode", rc); |
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346 | } |
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347 | |
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348 | /* |
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349 | * Verify I am the owner of the node or the super user. |
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350 | */ |
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351 | |
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352 | #if defined (RTEMS_POSIX_API) |
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353 | uid = geteuid(); |
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354 | |
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355 | if ((uid != rtems_rfs_inode_get_uid (&inode)) && (uid != 0)) |
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356 | { |
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357 | rtems_rfs_inode_close (fs, &inode); |
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358 | return rtems_rfs_rtems_error ("chown: not able", EPERM); |
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359 | } |
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360 | #endif |
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361 | |
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362 | rtems_rfs_inode_set_uid_gid (&inode, owner, group); |
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363 | |
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364 | rc = rtems_rfs_inode_close (fs, &inode); |
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365 | if (rc) |
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366 | { |
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367 | return rtems_rfs_rtems_error ("chown: closing inode", rc); |
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368 | } |
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369 | |
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370 | return 0; |
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371 | } |
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372 | |
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373 | /** |
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374 | * This routine is the implementation of the utime() system call for the |
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375 | * RFS. |
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376 | * |
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377 | * @param pathloc |
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378 | * @param atime |
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379 | * @param mtime |
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380 | * return int |
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381 | */ |
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382 | |
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383 | static int |
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384 | rtems_rfs_rtems_utime(const rtems_filesystem_location_info_t* pathloc, |
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385 | time_t atime, |
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386 | time_t mtime) |
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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 | rc = rtems_rfs_inode_open (fs, ino, &inode, true); |
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394 | if (rc) |
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395 | { |
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396 | return rtems_rfs_rtems_error ("utime: read inode", rc); |
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397 | } |
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398 | |
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399 | rtems_rfs_inode_set_atime (&inode, atime); |
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400 | rtems_rfs_inode_set_mtime (&inode, mtime); |
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401 | |
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402 | rc = rtems_rfs_inode_close (fs, &inode); |
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403 | if (rc) |
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404 | { |
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405 | return rtems_rfs_rtems_error ("utime: closing inode", rc); |
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406 | } |
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407 | |
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408 | return 0; |
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409 | } |
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410 | |
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411 | /** |
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412 | * The following routine creates a new symbolic link node under parent with the |
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413 | * name given in node_name. |
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414 | */ |
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415 | |
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416 | static int |
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417 | rtems_rfs_rtems_symlink (const rtems_filesystem_location_info_t* parent_loc, |
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418 | const char* node_name, |
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419 | size_t node_name_len, |
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420 | const char* target) |
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421 | { |
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422 | rtems_rfs_file_system* fs = rtems_rfs_rtems_pathloc_dev (parent_loc); |
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423 | rtems_rfs_ino parent = rtems_rfs_rtems_get_pathloc_ino (parent_loc); |
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424 | int rc; |
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425 | |
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426 | rc = rtems_rfs_symlink (fs, node_name, node_name_len, |
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427 | target, strlen (target), |
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428 | geteuid(), getegid(), parent); |
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429 | if (rc) |
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430 | { |
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431 | return rtems_rfs_rtems_error ("symlink: linking", rc); |
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432 | } |
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433 | |
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434 | return 0; |
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435 | } |
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436 | |
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437 | /** |
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438 | * The following rouine puts the symblic links destination name into buf. |
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439 | */ |
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440 | |
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441 | static ssize_t |
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442 | rtems_rfs_rtems_readlink (const rtems_filesystem_location_info_t* pathloc, |
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443 | char* buf, |
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444 | size_t bufsize) |
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445 | { |
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446 | rtems_rfs_file_system* fs = rtems_rfs_rtems_pathloc_dev (pathloc); |
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447 | rtems_rfs_ino ino = rtems_rfs_rtems_get_pathloc_ino (pathloc); |
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448 | size_t length; |
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449 | int rc; |
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450 | |
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451 | if (rtems_rfs_rtems_trace (RTEMS_RFS_RTEMS_DEBUG_READLINK)) |
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452 | printf ("rtems-rfs-rtems: readlink: in: ino:%" PRId32 "\n", ino); |
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453 | |
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454 | rc = rtems_rfs_symlink_read (fs, ino, buf, bufsize, &length); |
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455 | if (rc) |
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456 | { |
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457 | return rtems_rfs_rtems_error ("readlink: reading link", rc); |
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458 | } |
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459 | |
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460 | return (ssize_t) length; |
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461 | } |
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462 | |
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463 | static int |
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464 | rtems_rfs_rtems_fchmod (const rtems_filesystem_location_info_t* pathloc, |
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465 | mode_t mode) |
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466 | { |
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467 | rtems_rfs_file_system* fs = rtems_rfs_rtems_pathloc_dev (pathloc); |
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468 | rtems_rfs_ino ino = rtems_rfs_rtems_get_pathloc_ino (pathloc); |
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469 | rtems_rfs_inode_handle inode; |
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470 | uint16_t imode; |
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471 | #if defined (RTEMS_POSIX_API) |
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472 | uid_t uid; |
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473 | #endif |
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474 | int rc; |
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475 | |
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476 | if (rtems_rfs_rtems_trace (RTEMS_RFS_RTEMS_DEBUG_FCHMOD)) |
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477 | printf ("rtems-rfs-rtems: fchmod: in: ino:%" PRId32 " mode:%06" PRIomode_t "\n", |
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478 | ino, mode); |
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479 | |
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480 | rc = rtems_rfs_inode_open (fs, ino, &inode, true); |
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481 | if (rc) |
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482 | { |
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483 | return rtems_rfs_rtems_error ("fchmod: opening inode", rc); |
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484 | } |
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485 | |
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486 | imode = rtems_rfs_inode_get_mode (&inode); |
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487 | |
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488 | /* |
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489 | * Verify I am the owner of the node or the super user. |
---|
490 | */ |
---|
491 | #if defined (RTEMS_POSIX_API) |
---|
492 | uid = geteuid(); |
---|
493 | |
---|
494 | if ((uid != rtems_rfs_inode_get_uid (&inode)) && (uid != 0)) |
---|
495 | { |
---|
496 | rtems_rfs_inode_close (fs, &inode); |
---|
497 | return rtems_rfs_rtems_error ("fchmod: checking uid", EPERM); |
---|
498 | } |
---|
499 | #endif |
---|
500 | |
---|
501 | imode &= ~(S_IRWXU | S_IRWXG | S_IRWXO | S_ISUID | S_ISGID | S_ISVTX); |
---|
502 | imode |= mode & (S_IRWXU | S_IRWXG | S_IRWXO | S_ISUID | S_ISGID | S_ISVTX); |
---|
503 | |
---|
504 | rtems_rfs_inode_set_mode (&inode, imode); |
---|
505 | |
---|
506 | rc = rtems_rfs_inode_close (fs, &inode); |
---|
507 | if (rc > 0) |
---|
508 | { |
---|
509 | return rtems_rfs_rtems_error ("fchmod: closing inode", rc); |
---|
510 | } |
---|
511 | |
---|
512 | return 0; |
---|
513 | } |
---|
514 | |
---|
515 | int |
---|
516 | rtems_rfs_rtems_fstat (const rtems_filesystem_location_info_t* pathloc, |
---|
517 | struct stat* buf) |
---|
518 | { |
---|
519 | rtems_rfs_file_system* fs = rtems_rfs_rtems_pathloc_dev (pathloc); |
---|
520 | rtems_rfs_ino ino = rtems_rfs_rtems_get_pathloc_ino (pathloc); |
---|
521 | rtems_rfs_inode_handle inode; |
---|
522 | rtems_rfs_file_shared* shared; |
---|
523 | uint16_t mode; |
---|
524 | int rc; |
---|
525 | |
---|
526 | if (rtems_rfs_rtems_trace (RTEMS_RFS_RTEMS_DEBUG_STAT)) |
---|
527 | printf ("rtems-rfs-rtems: stat: in: ino:%" PRId32 "\n", ino); |
---|
528 | |
---|
529 | rc = rtems_rfs_inode_open (fs, ino, &inode, true); |
---|
530 | if (rc) |
---|
531 | { |
---|
532 | return rtems_rfs_rtems_error ("stat: opening inode", rc); |
---|
533 | } |
---|
534 | |
---|
535 | mode = rtems_rfs_inode_get_mode (&inode); |
---|
536 | |
---|
537 | if (RTEMS_RFS_S_ISCHR (mode) || RTEMS_RFS_S_ISBLK (mode)) |
---|
538 | { |
---|
539 | buf->st_rdev = |
---|
540 | rtems_filesystem_make_dev_t (rtems_rfs_inode_get_block (&inode, 0), |
---|
541 | rtems_rfs_inode_get_block (&inode, 1)); |
---|
542 | } |
---|
543 | |
---|
544 | buf->st_dev = rtems_rfs_fs_device (fs); |
---|
545 | buf->st_ino = rtems_rfs_inode_ino (&inode); |
---|
546 | buf->st_mode = rtems_rfs_rtems_mode (mode); |
---|
547 | buf->st_nlink = rtems_rfs_inode_get_links (&inode); |
---|
548 | buf->st_uid = rtems_rfs_inode_get_uid (&inode); |
---|
549 | buf->st_gid = rtems_rfs_inode_get_gid (&inode); |
---|
550 | |
---|
551 | /* |
---|
552 | * Need to check is the ino is an open file. If so we take the values from |
---|
553 | * the open file rather than the inode. |
---|
554 | */ |
---|
555 | shared = rtems_rfs_file_get_shared (fs, rtems_rfs_inode_ino (&inode)); |
---|
556 | |
---|
557 | if (shared) |
---|
558 | { |
---|
559 | buf->st_atime = rtems_rfs_file_shared_get_atime (shared); |
---|
560 | buf->st_mtime = rtems_rfs_file_shared_get_mtime (shared); |
---|
561 | buf->st_ctime = rtems_rfs_file_shared_get_ctime (shared); |
---|
562 | buf->st_blocks = rtems_rfs_file_shared_get_block_count (shared); |
---|
563 | |
---|
564 | if (S_ISLNK (buf->st_mode)) |
---|
565 | buf->st_size = rtems_rfs_file_shared_get_block_offset (shared); |
---|
566 | else |
---|
567 | buf->st_size = rtems_rfs_file_shared_get_size (fs, shared); |
---|
568 | } |
---|
569 | else |
---|
570 | { |
---|
571 | buf->st_atime = rtems_rfs_inode_get_atime (&inode); |
---|
572 | buf->st_mtime = rtems_rfs_inode_get_mtime (&inode); |
---|
573 | buf->st_ctime = rtems_rfs_inode_get_ctime (&inode); |
---|
574 | buf->st_blocks = rtems_rfs_inode_get_block_count (&inode); |
---|
575 | |
---|
576 | if (S_ISLNK (buf->st_mode)) |
---|
577 | buf->st_size = rtems_rfs_inode_get_block_offset (&inode); |
---|
578 | else |
---|
579 | buf->st_size = rtems_rfs_inode_get_size (fs, &inode); |
---|
580 | } |
---|
581 | |
---|
582 | buf->st_blksize = rtems_rfs_fs_block_size (fs); |
---|
583 | |
---|
584 | rc = rtems_rfs_inode_close (fs, &inode); |
---|
585 | if (rc > 0) |
---|
586 | { |
---|
587 | return rtems_rfs_rtems_error ("stat: closing inode", rc); |
---|
588 | } |
---|
589 | |
---|
590 | return 0; |
---|
591 | } |
---|
592 | |
---|
593 | /** |
---|
594 | * Routine to create a node in the RFS file system. |
---|
595 | */ |
---|
596 | |
---|
597 | static int |
---|
598 | rtems_rfs_rtems_mknod (const rtems_filesystem_location_info_t *parentloc, |
---|
599 | const char *name, |
---|
600 | size_t namelen, |
---|
601 | mode_t mode, |
---|
602 | dev_t dev) |
---|
603 | { |
---|
604 | rtems_rfs_file_system* fs = rtems_rfs_rtems_pathloc_dev (parentloc); |
---|
605 | rtems_rfs_ino parent = rtems_rfs_rtems_get_pathloc_ino (parentloc); |
---|
606 | rtems_rfs_ino ino; |
---|
607 | rtems_rfs_inode_handle inode; |
---|
608 | uid_t uid; |
---|
609 | gid_t gid; |
---|
610 | int rc; |
---|
611 | |
---|
612 | #if defined(RTEMS_POSIX_API) |
---|
613 | uid = geteuid (); |
---|
614 | gid = getegid (); |
---|
615 | #else |
---|
616 | uid = 0; |
---|
617 | gid = 0; |
---|
618 | #endif |
---|
619 | |
---|
620 | rc = rtems_rfs_inode_create (fs, parent, name, namelen, |
---|
621 | rtems_rfs_rtems_imode (mode), |
---|
622 | 1, uid, gid, &ino); |
---|
623 | if (rc > 0) |
---|
624 | { |
---|
625 | return rtems_rfs_rtems_error ("mknod: inode create", rc); |
---|
626 | } |
---|
627 | |
---|
628 | rc = rtems_rfs_inode_open (fs, ino, &inode, true); |
---|
629 | if (rc > 0) |
---|
630 | { |
---|
631 | return rtems_rfs_rtems_error ("mknod: inode open", rc); |
---|
632 | } |
---|
633 | |
---|
634 | if (S_ISDIR(mode) || S_ISREG(mode)) |
---|
635 | { |
---|
636 | } |
---|
637 | else if (S_ISCHR (mode) || S_ISBLK (mode)) |
---|
638 | { |
---|
639 | int major; |
---|
640 | int minor; |
---|
641 | rtems_filesystem_split_dev_t (dev, major, minor); |
---|
642 | rtems_rfs_inode_set_block (&inode, 0, major); |
---|
643 | rtems_rfs_inode_set_block (&inode, 1, minor); |
---|
644 | } |
---|
645 | else |
---|
646 | { |
---|
647 | rtems_rfs_inode_close (fs, &inode); |
---|
648 | return rtems_rfs_rtems_error ("mknod: bad mode", EINVAL); |
---|
649 | } |
---|
650 | |
---|
651 | rc = rtems_rfs_inode_close (fs, &inode); |
---|
652 | if (rc > 0) |
---|
653 | { |
---|
654 | return rtems_rfs_rtems_error ("mknod: closing inode", rc); |
---|
655 | } |
---|
656 | |
---|
657 | return 0; |
---|
658 | } |
---|
659 | |
---|
660 | /** |
---|
661 | * Routine to remove a node from the RFS file system. |
---|
662 | * |
---|
663 | * @param parent_pathloc |
---|
664 | * @param pathloc |
---|
665 | * @return int |
---|
666 | */ |
---|
667 | int |
---|
668 | rtems_rfs_rtems_rmnod (const rtems_filesystem_location_info_t* parent_pathloc, |
---|
669 | const rtems_filesystem_location_info_t* pathloc) |
---|
670 | { |
---|
671 | rtems_rfs_file_system* fs = rtems_rfs_rtems_pathloc_dev (pathloc); |
---|
672 | rtems_rfs_ino parent = rtems_rfs_rtems_get_pathloc_ino (parent_pathloc); |
---|
673 | rtems_rfs_ino ino = rtems_rfs_rtems_get_pathloc_ino (pathloc); |
---|
674 | uint32_t doff = rtems_rfs_rtems_get_pathloc_doff (pathloc); |
---|
675 | int rc; |
---|
676 | |
---|
677 | if (rtems_rfs_rtems_trace (RTEMS_RFS_RTEMS_DEBUG_RMNOD)) |
---|
678 | printf ("rtems-rfs: rmnod: parent:%" PRId32 " doff:%" PRIu32 ", ino:%" PRId32 "\n", |
---|
679 | parent, doff, ino); |
---|
680 | |
---|
681 | rc = rtems_rfs_unlink (fs, parent, ino, doff, rtems_rfs_unlink_dir_if_empty); |
---|
682 | if (rc) |
---|
683 | { |
---|
684 | return rtems_rfs_rtems_error ("rmnod: unlinking", rc); |
---|
685 | } |
---|
686 | |
---|
687 | return 0; |
---|
688 | } |
---|
689 | |
---|
690 | /** |
---|
691 | * The following routine does a sync on an inode node. Currently it flushes |
---|
692 | * everything related to this device. |
---|
693 | * |
---|
694 | * @param iop |
---|
695 | * @return int |
---|
696 | */ |
---|
697 | int |
---|
698 | rtems_rfs_rtems_fdatasync (rtems_libio_t* iop) |
---|
699 | { |
---|
700 | int rc; |
---|
701 | |
---|
702 | rc = rtems_rfs_buffer_sync (rtems_rfs_rtems_pathloc_dev (&iop->pathinfo)); |
---|
703 | if (rc) |
---|
704 | return rtems_rfs_rtems_error ("fdatasync: sync", rc); |
---|
705 | |
---|
706 | return 0; |
---|
707 | } |
---|
708 | |
---|
709 | /** |
---|
710 | * Rename the node. |
---|
711 | */ |
---|
712 | static int |
---|
713 | rtems_rfs_rtems_rename(const rtems_filesystem_location_info_t* old_parent_loc, |
---|
714 | const rtems_filesystem_location_info_t* old_loc, |
---|
715 | const rtems_filesystem_location_info_t* new_parent_loc, |
---|
716 | const char* new_name, |
---|
717 | size_t new_name_len) |
---|
718 | { |
---|
719 | rtems_rfs_file_system* fs = rtems_rfs_rtems_pathloc_dev (old_loc); |
---|
720 | rtems_rfs_ino old_parent; |
---|
721 | rtems_rfs_ino new_parent; |
---|
722 | rtems_rfs_ino ino; |
---|
723 | uint32_t doff; |
---|
724 | int rc; |
---|
725 | |
---|
726 | old_parent = rtems_rfs_rtems_get_pathloc_ino (old_parent_loc); |
---|
727 | new_parent = rtems_rfs_rtems_get_pathloc_ino (new_parent_loc); |
---|
728 | |
---|
729 | ino = rtems_rfs_rtems_get_pathloc_ino (old_loc); |
---|
730 | doff = rtems_rfs_rtems_get_pathloc_doff (old_loc); |
---|
731 | |
---|
732 | if (rtems_rfs_rtems_trace (RTEMS_RFS_RTEMS_DEBUG_RENAME)) |
---|
733 | printf ("rtems-rfs: rename: ino:%" PRId32 " doff:%" PRIu32 ", new parent:%" PRId32 "\n", |
---|
734 | ino, doff, new_parent); |
---|
735 | |
---|
736 | /* |
---|
737 | * Link to the inode before unlinking so the inode is not erased when |
---|
738 | * unlinked. |
---|
739 | */ |
---|
740 | rc = rtems_rfs_link (fs, new_name, new_name_len, new_parent, ino, true); |
---|
741 | if (rc) |
---|
742 | { |
---|
743 | return rtems_rfs_rtems_error ("rename: linking", rc); |
---|
744 | } |
---|
745 | |
---|
746 | /* |
---|
747 | * Unlink all inodes even directories with the dir option as false because a |
---|
748 | * directory may not be empty. |
---|
749 | */ |
---|
750 | rc = rtems_rfs_unlink (fs, old_parent, ino, doff, |
---|
751 | rtems_rfs_unlink_dir_allowed); |
---|
752 | if (rc) |
---|
753 | { |
---|
754 | return rtems_rfs_rtems_error ("rename: unlinking", rc); |
---|
755 | } |
---|
756 | |
---|
757 | return 0; |
---|
758 | } |
---|
759 | |
---|
760 | /** |
---|
761 | * Return the file system stat data. |
---|
762 | * |
---|
763 | * @param pathloc |
---|
764 | * @param sb |
---|
765 | * @return int |
---|
766 | */ |
---|
767 | static int |
---|
768 | rtems_rfs_rtems_statvfs (const rtems_filesystem_location_info_t* pathloc, |
---|
769 | struct statvfs* sb) |
---|
770 | { |
---|
771 | rtems_rfs_file_system* fs = rtems_rfs_rtems_pathloc_dev (pathloc); |
---|
772 | size_t blocks; |
---|
773 | size_t inodes; |
---|
774 | |
---|
775 | rtems_rfs_group_usage (fs, &blocks, &inodes); |
---|
776 | |
---|
777 | sb->f_bsize = rtems_rfs_fs_block_size (fs); |
---|
778 | sb->f_frsize = rtems_rfs_fs_media_block_size (fs); |
---|
779 | sb->f_blocks = rtems_rfs_fs_media_blocks (fs); |
---|
780 | sb->f_bfree = rtems_rfs_fs_blocks (fs) - blocks; |
---|
781 | sb->f_bavail = sb->f_bfree; |
---|
782 | sb->f_files = rtems_rfs_fs_inodes (fs); |
---|
783 | sb->f_ffree = rtems_rfs_fs_inodes (fs) - inodes; |
---|
784 | sb->f_favail = sb->f_ffree; |
---|
785 | sb->f_fsid = RTEMS_RFS_SB_MAGIC; |
---|
786 | sb->f_flag = rtems_rfs_fs_flags (fs); |
---|
787 | sb->f_namemax = rtems_rfs_fs_max_name (fs); |
---|
788 | |
---|
789 | return 0; |
---|
790 | } |
---|
791 | |
---|
792 | /** |
---|
793 | * Handler table for RFS link nodes |
---|
794 | */ |
---|
795 | const rtems_filesystem_file_handlers_r rtems_rfs_rtems_link_handlers = |
---|
796 | { |
---|
797 | .open_h = rtems_filesystem_default_open, |
---|
798 | .close_h = rtems_filesystem_default_close, |
---|
799 | .read_h = rtems_filesystem_default_read, |
---|
800 | .write_h = rtems_filesystem_default_write, |
---|
801 | .ioctl_h = rtems_filesystem_default_ioctl, |
---|
802 | .lseek_h = rtems_filesystem_default_lseek, |
---|
803 | .fstat_h = rtems_rfs_rtems_fstat, |
---|
804 | .ftruncate_h = rtems_filesystem_default_ftruncate, |
---|
805 | .fsync_h = rtems_filesystem_default_fsync_or_fdatasync, |
---|
806 | .fdatasync_h = rtems_filesystem_default_fsync_or_fdatasync, |
---|
807 | .fcntl_h = rtems_filesystem_default_fcntl |
---|
808 | }; |
---|
809 | |
---|
810 | /** |
---|
811 | * Forward decl for the ops table. |
---|
812 | */ |
---|
813 | |
---|
814 | int rtems_rfs_rtems_initialise (rtems_filesystem_mount_table_entry_t *mt_entry, |
---|
815 | const void *data); |
---|
816 | void rtems_rfs_rtems_shutdown (rtems_filesystem_mount_table_entry_t *mt_entry); |
---|
817 | |
---|
818 | /** |
---|
819 | * RFS file system operations table. |
---|
820 | */ |
---|
821 | const rtems_filesystem_operations_table rtems_rfs_ops = |
---|
822 | { |
---|
823 | .lock_h = rtems_rfs_rtems_lock_by_mt_entry, |
---|
824 | .unlock_h = rtems_rfs_rtems_unlock_by_mt_entry, |
---|
825 | .are_nodes_equal_h = rtems_filesystem_default_are_nodes_equal, |
---|
826 | .eval_path_h = rtems_rfs_rtems_eval_path, |
---|
827 | .link_h = rtems_rfs_rtems_link, |
---|
828 | .node_type_h = rtems_rfs_rtems_node_type, |
---|
829 | .fchmod_h = rtems_rfs_rtems_fchmod, |
---|
830 | .mknod_h = rtems_rfs_rtems_mknod, |
---|
831 | .rmnod_h = rtems_rfs_rtems_rmnod, |
---|
832 | .chown_h = rtems_rfs_rtems_chown, |
---|
833 | .clonenod_h = rtems_filesystem_default_clonenode, |
---|
834 | .freenod_h = rtems_filesystem_default_freenode, |
---|
835 | .mount_h = rtems_filesystem_default_mount, |
---|
836 | .fsmount_me_h = rtems_rfs_rtems_initialise, |
---|
837 | .unmount_h = rtems_filesystem_default_unmount, |
---|
838 | .fsunmount_me_h = rtems_rfs_rtems_shutdown, |
---|
839 | .utime_h = rtems_rfs_rtems_utime, |
---|
840 | .symlink_h = rtems_rfs_rtems_symlink, |
---|
841 | .readlink_h = rtems_rfs_rtems_readlink, |
---|
842 | .rename_h = rtems_rfs_rtems_rename, |
---|
843 | .statvfs_h = rtems_rfs_rtems_statvfs |
---|
844 | }; |
---|
845 | |
---|
846 | /** |
---|
847 | * Open the file system. |
---|
848 | */ |
---|
849 | |
---|
850 | int |
---|
851 | rtems_rfs_rtems_initialise (rtems_filesystem_mount_table_entry_t* mt_entry, |
---|
852 | const void* data) |
---|
853 | { |
---|
854 | rtems_rfs_rtems_private* rtems; |
---|
855 | rtems_rfs_file_system* fs; |
---|
856 | uint32_t flags = 0; |
---|
857 | uint32_t max_held_buffers = RTEMS_RFS_FS_MAX_HELD_BUFFERS; |
---|
858 | const char* options = data; |
---|
859 | int rc; |
---|
860 | |
---|
861 | /* |
---|
862 | * Parse the options the user specifiies. |
---|
863 | */ |
---|
864 | while (options) |
---|
865 | { |
---|
866 | printf ("options=%s\n", options); |
---|
867 | if (strncmp (options, "hold-bitmaps", |
---|
868 | sizeof ("hold-bitmaps") - 1) == 0) |
---|
869 | flags |= RTEMS_RFS_FS_BITMAPS_HOLD; |
---|
870 | else if (strncmp (options, "no-local-cache", |
---|
871 | sizeof ("no-local-cache") - 1) == 0) |
---|
872 | flags |= RTEMS_RFS_FS_NO_LOCAL_CACHE; |
---|
873 | else if (strncmp (options, "max-held-bufs", |
---|
874 | sizeof ("max-held-bufs") - 1) == 0) |
---|
875 | { |
---|
876 | max_held_buffers = strtoul (options + sizeof ("max-held-bufs"), 0, 0); |
---|
877 | } |
---|
878 | else |
---|
879 | return rtems_rfs_rtems_error ("initialise: invalid option", EINVAL); |
---|
880 | |
---|
881 | options = strchr (options, ','); |
---|
882 | if (options) |
---|
883 | { |
---|
884 | ++options; |
---|
885 | if (*options == '\0') |
---|
886 | options = NULL; |
---|
887 | } |
---|
888 | } |
---|
889 | |
---|
890 | rtems = malloc (sizeof (rtems_rfs_rtems_private)); |
---|
891 | if (!rtems) |
---|
892 | return rtems_rfs_rtems_error ("initialise: local data", ENOMEM); |
---|
893 | |
---|
894 | memset (rtems, 0, sizeof (rtems_rfs_rtems_private)); |
---|
895 | |
---|
896 | rc = rtems_rfs_mutex_create (&rtems->access); |
---|
897 | if (rc > 0) |
---|
898 | { |
---|
899 | free (rtems); |
---|
900 | return rtems_rfs_rtems_error ("initialise: cannot create mutex", rc); |
---|
901 | } |
---|
902 | |
---|
903 | rc = rtems_rfs_mutex_lock (&rtems->access); |
---|
904 | if (rc > 0) |
---|
905 | { |
---|
906 | rtems_rfs_mutex_destroy (&rtems->access); |
---|
907 | free (rtems); |
---|
908 | return rtems_rfs_rtems_error ("initialise: cannot lock access mutex", rc); |
---|
909 | } |
---|
910 | |
---|
911 | rc = rtems_rfs_fs_open (mt_entry->dev, rtems, flags, max_held_buffers, &fs); |
---|
912 | if (rc) |
---|
913 | { |
---|
914 | free (rtems); |
---|
915 | return rtems_rfs_rtems_error ("initialise: open", rc); |
---|
916 | } |
---|
917 | |
---|
918 | mt_entry->fs_info = fs; |
---|
919 | mt_entry->ops = &rtems_rfs_ops; |
---|
920 | mt_entry->mt_fs_root->location.node_access = (void*) RTEMS_RFS_ROOT_INO; |
---|
921 | mt_entry->mt_fs_root->location.handlers = &rtems_rfs_rtems_dir_handlers; |
---|
922 | |
---|
923 | rtems_rfs_rtems_unlock (fs); |
---|
924 | |
---|
925 | return 0; |
---|
926 | } |
---|
927 | |
---|
928 | /** |
---|
929 | * Shutdown the file system. |
---|
930 | */ |
---|
931 | void |
---|
932 | rtems_rfs_rtems_shutdown (rtems_filesystem_mount_table_entry_t* mt_entry) |
---|
933 | { |
---|
934 | rtems_rfs_file_system* fs = mt_entry->fs_info; |
---|
935 | rtems_rfs_rtems_private* rtems; |
---|
936 | |
---|
937 | rtems = rtems_rfs_fs_user (fs); |
---|
938 | |
---|
939 | /* FIXME: Return value? */ |
---|
940 | rtems_rfs_fs_close(fs); |
---|
941 | |
---|
942 | rtems_rfs_mutex_destroy (&rtems->access); |
---|
943 | free (rtems); |
---|
944 | } |
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