1 | /* SPDX-License-Identifier: BSD-2-Clause */ |
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2 | |
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3 | /** |
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4 | * @file |
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5 | * |
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6 | * @ingroup RTEMSMedia |
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7 | * |
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8 | * @brief Media implementation. |
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9 | */ |
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10 | |
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11 | /* |
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12 | * Copyright (C) 2009, 2013 embedded brains GmbH & Co. KG |
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13 | * |
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14 | * Redistribution and use in source and binary forms, with or without |
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15 | * modification, are permitted provided that the following conditions |
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16 | * are met: |
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17 | * 1. Redistributions of source code must retain the above copyright |
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18 | * notice, this list of conditions and the following disclaimer. |
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19 | * 2. Redistributions in binary form must reproduce the above copyright |
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20 | * notice, this list of conditions and the following disclaimer in the |
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21 | * documentation and/or other materials provided with the distribution. |
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22 | * |
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23 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
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24 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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25 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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26 | * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE |
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27 | * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
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28 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
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29 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
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30 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
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31 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
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32 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
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33 | * POSSIBILITY OF SUCH DAMAGE. |
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34 | */ |
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35 | |
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36 | #include <stdlib.h> |
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37 | #include <string.h> |
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38 | #include <assert.h> |
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39 | #include <unistd.h> |
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40 | |
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41 | #include <rtems/media.h> |
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42 | |
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43 | #include <rtems.h> |
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44 | #include <rtems/bdbuf.h> |
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45 | #include <rtems/blkdev.h> |
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46 | #include <rtems/bdpart.h> |
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47 | #include <rtems/libio.h> |
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48 | #include <rtems/dosfs.h> |
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49 | #include <rtems/thread.h> |
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50 | |
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51 | typedef struct { |
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52 | rtems_bdpart_partition *partitions; |
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53 | size_t *count; |
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54 | } partition_table; |
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55 | |
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56 | typedef struct { |
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57 | size_t index; |
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58 | rtems_blkdev_bnum begin; |
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59 | rtems_blkdev_bnum count; |
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60 | } partition; |
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61 | |
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62 | typedef struct media_item { |
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63 | rtems_chain_node node; |
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64 | struct media_item *parent; |
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65 | char *disk_path; |
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66 | char *mount_path; |
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67 | } media_item; |
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68 | |
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69 | typedef struct listener_item { |
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70 | rtems_chain_node node; |
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71 | rtems_media_listener listener; |
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72 | void *listener_arg; |
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73 | } listener_item; |
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74 | |
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75 | static RTEMS_CHAIN_DEFINE_EMPTY(listener_item_chain); |
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76 | |
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77 | static RTEMS_CHAIN_DEFINE_EMPTY(media_item_chain); |
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78 | |
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79 | static rtems_mutex media_mutex = RTEMS_MUTEX_INITIALIZER("Media"); |
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80 | |
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81 | static void lock(void) |
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82 | { |
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83 | rtems_mutex_lock(&media_mutex); |
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84 | } |
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85 | |
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86 | static void unlock(void) |
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87 | { |
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88 | rtems_mutex_unlock(&media_mutex); |
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89 | } |
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90 | |
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91 | static listener_item *find_listener( |
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92 | rtems_media_listener listener, |
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93 | void *listener_arg |
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94 | ) |
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95 | { |
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96 | rtems_chain_node *node = rtems_chain_first(&listener_item_chain); |
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97 | |
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98 | while (!rtems_chain_is_tail(&listener_item_chain, node)) { |
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99 | listener_item *item = (listener_item *) node; |
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100 | |
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101 | if (item->listener == listener && item->listener_arg == listener_arg) { |
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102 | return item; |
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103 | } |
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104 | |
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105 | node = rtems_chain_next(node); |
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106 | } |
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107 | |
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108 | return NULL; |
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109 | } |
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110 | |
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111 | rtems_status_code rtems_media_listener_add( |
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112 | rtems_media_listener listener, |
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113 | void *listener_arg |
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114 | ) |
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115 | { |
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116 | rtems_status_code sc = RTEMS_SUCCESSFUL; |
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117 | listener_item *item; |
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118 | |
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119 | lock(); |
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120 | |
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121 | item = find_listener(listener, listener_arg); |
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122 | |
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123 | if (item == NULL) { |
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124 | item = malloc(sizeof(*item)); |
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125 | if (item != NULL) { |
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126 | item->listener = listener; |
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127 | item->listener_arg = listener_arg; |
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128 | rtems_chain_initialize_node(&item->node); |
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129 | rtems_chain_append_unprotected(&listener_item_chain, &item->node); |
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130 | } else { |
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131 | sc = RTEMS_NO_MEMORY; |
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132 | } |
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133 | } else { |
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134 | sc = RTEMS_TOO_MANY; |
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135 | } |
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136 | |
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137 | unlock(); |
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138 | |
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139 | return sc; |
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140 | } |
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141 | |
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142 | rtems_status_code rtems_media_listener_remove( |
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143 | rtems_media_listener listener, |
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144 | void *listener_arg |
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145 | ) |
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146 | { |
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147 | rtems_status_code sc = RTEMS_SUCCESSFUL; |
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148 | listener_item *item; |
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149 | |
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150 | lock(); |
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151 | |
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152 | item = find_listener(listener, listener_arg); |
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153 | |
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154 | if (item != NULL) { |
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155 | rtems_chain_extract_unprotected(&item->node); |
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156 | free(item); |
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157 | } else { |
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158 | sc = RTEMS_INVALID_ID; |
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159 | } |
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160 | |
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161 | unlock(); |
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162 | |
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163 | return sc; |
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164 | } |
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165 | |
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166 | static rtems_status_code notify( |
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167 | rtems_media_event event, |
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168 | rtems_media_state state, |
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169 | const char *src, |
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170 | const char *dest |
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171 | ) |
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172 | { |
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173 | rtems_status_code sc = RTEMS_SUCCESSFUL; |
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174 | rtems_status_code rsc = RTEMS_SUCCESSFUL; |
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175 | rtems_chain_node *node = rtems_chain_first(&listener_item_chain); |
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176 | |
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177 | while (!rtems_chain_is_tail(&listener_item_chain, node)) { |
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178 | listener_item *item = (listener_item *) node; |
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179 | |
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180 | sc = (*item->listener)(event, state, src, dest, item->listener_arg); |
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181 | if (sc != RTEMS_SUCCESSFUL) { |
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182 | rsc = sc; |
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183 | } |
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184 | |
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185 | node = rtems_chain_next(node); |
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186 | } |
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187 | |
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188 | return rsc; |
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189 | } |
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190 | |
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191 | static void error( |
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192 | rtems_media_state state, |
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193 | const char *src, |
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194 | const char *dest |
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195 | ) |
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196 | { |
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197 | (void) notify(RTEMS_MEDIA_EVENT_ERROR, state, src, dest); |
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198 | } |
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199 | |
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200 | static media_item *get_media_item( |
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201 | const char *disk_path, |
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202 | const char *mount_path |
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203 | ) |
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204 | { |
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205 | rtems_chain_node *node = rtems_chain_first(&media_item_chain); |
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206 | |
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207 | while (!rtems_chain_is_tail(&media_item_chain, node)) { |
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208 | media_item *item = (media_item *) node; |
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209 | |
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210 | if ( |
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211 | (disk_path == NULL || strcmp(disk_path, item->disk_path) == 0) |
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212 | && (mount_path == NULL |
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213 | || (item->mount_path != NULL |
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214 | && strcmp(mount_path, item->mount_path) == 0)) |
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215 | ) { |
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216 | return item; |
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217 | } |
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218 | |
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219 | node = rtems_chain_next(node); |
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220 | } |
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221 | |
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222 | return NULL; |
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223 | } |
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224 | |
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225 | static void free_item(media_item *item) |
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226 | { |
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227 | rtems_chain_extract_unprotected(&item->node); |
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228 | free(item->mount_path); |
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229 | free(item); |
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230 | } |
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231 | |
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232 | static void create_item( |
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233 | media_item *parent, |
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234 | const char *disk_path, |
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235 | const char *mount_path |
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236 | ) |
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237 | { |
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238 | size_t disk_path_size = strlen(disk_path) + 1; |
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239 | media_item *item = malloc(sizeof(*item) + disk_path_size); |
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240 | |
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241 | if (item != NULL) { |
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242 | if (mount_path != NULL) { |
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243 | item->mount_path = strdup(mount_path); |
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244 | |
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245 | if (item->mount_path == NULL) { |
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246 | free(item); |
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247 | |
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248 | return; |
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249 | } |
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250 | } else { |
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251 | item->mount_path = NULL; |
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252 | } |
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253 | |
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254 | item->parent = parent; |
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255 | item->disk_path = (char *) item + sizeof(*item); |
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256 | memcpy(item->disk_path, disk_path, disk_path_size); |
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257 | rtems_chain_initialize_node(&item->node); |
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258 | rtems_chain_append(&media_item_chain, &item->node); |
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259 | } |
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260 | } |
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261 | |
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262 | static void remove_mount_point(const char *mount_path) |
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263 | { |
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264 | media_item *item = get_media_item(NULL, mount_path); |
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265 | |
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266 | if (item != NULL) { |
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267 | free(item->mount_path); |
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268 | item->mount_path = NULL; |
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269 | } else { |
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270 | error(RTEMS_MEDIA_ERROR_MOUNT_POINT_UNKNOWN, mount_path, NULL); |
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271 | } |
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272 | } |
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273 | |
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274 | static void remove_partition(const char *partition_path) |
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275 | { |
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276 | media_item *item = get_media_item(partition_path, NULL); |
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277 | |
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278 | if (item != NULL) { |
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279 | if (item->mount_path != NULL) { |
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280 | error( |
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281 | RTEMS_MEDIA_ERROR_PARTITION_DETACH_WITH_MOUNT, |
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282 | partition_path, |
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283 | item->mount_path |
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284 | ); |
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285 | } |
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286 | free_item(item); |
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287 | } else { |
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288 | error(RTEMS_MEDIA_ERROR_PARTITION_UNKNOWN, partition_path, NULL); |
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289 | } |
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290 | } |
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291 | |
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292 | static void remove_disk(const char *disk_path) |
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293 | { |
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294 | media_item *item = get_media_item(disk_path, NULL); |
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295 | |
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296 | if (item != NULL) { |
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297 | rtems_chain_node *node = rtems_chain_first(&media_item_chain); |
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298 | |
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299 | while (!rtems_chain_is_tail(&media_item_chain, node)) { |
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300 | media_item *child = (media_item *) node; |
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301 | |
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302 | node = rtems_chain_next(node); |
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303 | |
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304 | if (child->parent == item) { |
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305 | if (child->mount_path != NULL) { |
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306 | error( |
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307 | RTEMS_MEDIA_ERROR_MOUNT_POINT_ORPHAN, |
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308 | child->mount_path, |
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309 | disk_path |
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310 | ); |
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311 | } |
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312 | error(RTEMS_MEDIA_ERROR_PARTITION_ORPHAN, child->disk_path, disk_path); |
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313 | free_item(child); |
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314 | } |
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315 | } |
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316 | |
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317 | free_item(item); |
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318 | } else { |
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319 | error(RTEMS_MEDIA_ERROR_DISK_UNKNOWN, disk_path, NULL); |
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320 | } |
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321 | } |
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322 | |
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323 | static void add_disk(const char *disk_path) |
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324 | { |
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325 | media_item *item = get_media_item(disk_path, NULL); |
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326 | |
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327 | if (item != NULL) { |
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328 | error(RTEMS_MEDIA_ERROR_DISK_EXISTS, disk_path, NULL); |
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329 | remove_disk(disk_path); |
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330 | } |
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331 | |
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332 | create_item(NULL, disk_path, NULL); |
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333 | } |
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334 | |
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335 | static void add_partition(const char *disk_path, const char *partition_path) |
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336 | { |
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337 | media_item *item = get_media_item(partition_path, NULL); |
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338 | media_item *parent = get_media_item(disk_path, NULL); |
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339 | |
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340 | if (item != NULL) { |
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341 | error(RTEMS_MEDIA_ERROR_DISK_OR_PARTITION_EXISTS, partition_path, NULL); |
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342 | remove_disk(partition_path); |
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343 | } |
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344 | |
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345 | if (parent != NULL) { |
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346 | create_item(parent, partition_path, NULL); |
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347 | } else { |
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348 | error( |
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349 | RTEMS_MEDIA_ERROR_PARTITION_WITH_UNKNOWN_DISK, |
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350 | partition_path, |
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351 | disk_path |
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352 | ); |
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353 | } |
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354 | } |
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355 | |
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356 | static void add_mount_point(const char *disk_path, const char *mount_path) |
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357 | { |
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358 | media_item *item = get_media_item(disk_path, NULL); |
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359 | |
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360 | if (item != NULL) { |
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361 | if (item->mount_path != NULL) { |
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362 | error(RTEMS_MEDIA_ERROR_MOUNT_POINT_EXISTS, item->mount_path, NULL); |
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363 | free(item->mount_path); |
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364 | } |
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365 | item->mount_path = strdup(mount_path); |
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366 | } else { |
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367 | error(RTEMS_MEDIA_ERROR_DISK_OR_PARTITION_UNKNOWN, disk_path, NULL); |
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368 | } |
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369 | } |
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370 | |
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371 | static bool is_add_state(rtems_media_state state) |
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372 | { |
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373 | return state == RTEMS_MEDIA_STATE_SUCCESS; |
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374 | } |
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375 | |
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376 | static bool is_remove_state(rtems_media_state state) |
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377 | { |
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378 | return state == RTEMS_MEDIA_STATE_SUCCESS |
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379 | || state == RTEMS_MEDIA_STATE_FAILED; |
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380 | } |
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381 | |
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382 | static rtems_status_code remember_event( |
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383 | rtems_media_event event, |
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384 | rtems_media_state state, |
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385 | const char *src, |
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386 | const char *dest |
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387 | ) |
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388 | { |
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389 | switch (event) { |
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390 | case RTEMS_MEDIA_EVENT_DISK_ATTACH: |
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391 | if (is_add_state(state)) { |
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392 | add_disk(dest); |
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393 | } |
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394 | break; |
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395 | case RTEMS_MEDIA_EVENT_PARTITION_ATTACH: |
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396 | if (is_add_state(state)) { |
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397 | add_partition(src, dest); |
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398 | } |
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399 | break; |
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400 | case RTEMS_MEDIA_EVENT_MOUNT: |
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401 | if (is_add_state(state)) { |
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402 | add_mount_point(src, dest); |
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403 | } |
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404 | break; |
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405 | case RTEMS_MEDIA_EVENT_UNMOUNT: |
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406 | if (is_remove_state(state)) { |
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407 | remove_mount_point(src); |
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408 | } |
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409 | break; |
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410 | case RTEMS_MEDIA_EVENT_PARTITION_DETACH: |
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411 | if (is_remove_state(state)) { |
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412 | remove_partition(src); |
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413 | } |
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414 | break; |
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415 | case RTEMS_MEDIA_EVENT_DISK_DETACH: |
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416 | if (is_remove_state(state)) { |
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417 | remove_disk(src); |
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418 | } |
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419 | break; |
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420 | default: |
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421 | break; |
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422 | } |
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423 | |
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424 | return RTEMS_SUCCESSFUL; |
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425 | } |
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426 | |
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427 | static rtems_status_code process_event( |
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428 | rtems_media_event event, |
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429 | const char *src, |
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430 | char **dest_ptr, |
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431 | rtems_media_worker worker, |
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432 | void *worker_arg |
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433 | ) |
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434 | { |
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435 | rtems_status_code sc = RTEMS_SUCCESSFUL; |
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436 | rtems_status_code sc_retry = RTEMS_SUCCESSFUL; |
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437 | rtems_media_state state; |
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438 | char *dest = NULL; |
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439 | |
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440 | do { |
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441 | sc = notify(event, RTEMS_MEDIA_STATE_INQUIRY, src, NULL); |
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442 | if (sc == RTEMS_SUCCESSFUL) { |
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443 | state = RTEMS_MEDIA_STATE_READY; |
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444 | } else { |
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445 | state = RTEMS_MEDIA_STATE_ABORTED; |
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446 | } |
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447 | |
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448 | sc = (*worker)(state, src, &dest, worker_arg); |
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449 | if (state == RTEMS_MEDIA_STATE_READY) { |
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450 | if (sc == RTEMS_SUCCESSFUL) { |
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451 | state = RTEMS_MEDIA_STATE_SUCCESS; |
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452 | } else { |
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453 | state = RTEMS_MEDIA_STATE_FAILED; |
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454 | } |
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455 | } |
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456 | |
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457 | sc_retry = notify(event, state, src, dest); |
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458 | } while (state == RTEMS_MEDIA_STATE_FAILED |
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459 | && sc_retry == RTEMS_INCORRECT_STATE); |
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460 | remember_event(event, state, src, dest); |
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461 | |
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462 | if (state == RTEMS_MEDIA_STATE_SUCCESS) { |
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463 | sc = RTEMS_SUCCESSFUL; |
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464 | } else if (state == RTEMS_MEDIA_STATE_ABORTED) { |
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465 | sc = RTEMS_UNSATISFIED; |
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466 | } else { |
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467 | sc = RTEMS_IO_ERROR; |
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468 | } |
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469 | |
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470 | if (dest_ptr != NULL && sc == RTEMS_SUCCESSFUL) { |
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471 | *dest_ptr = dest; |
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472 | } else { |
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473 | free(dest); |
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474 | } |
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475 | |
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476 | return sc; |
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477 | } |
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478 | |
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479 | static rtems_status_code mount_worker( |
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480 | rtems_media_state state, |
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481 | const char *src, |
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482 | char **dest, |
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483 | void *worker_arg |
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484 | ) |
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485 | { |
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486 | int rv = 0; |
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487 | |
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488 | if (state == RTEMS_MEDIA_STATE_READY) { |
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489 | rtems_dosfs_mount_options mount_options; |
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490 | char *mount_path = NULL; |
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491 | |
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492 | if (worker_arg == NULL) { |
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493 | mount_path = rtems_media_replace_prefix(RTEMS_MEDIA_MOUNT_BASE, src); |
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494 | } else { |
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495 | mount_path = strdup(worker_arg); |
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496 | } |
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497 | |
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498 | if (mount_path == NULL) { |
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499 | return RTEMS_IO_ERROR; |
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500 | } |
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501 | |
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502 | rv = rtems_mkdir(mount_path, S_IRWXU | S_IRWXG | S_IRWXO); |
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503 | if (rv != 0) { |
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504 | free(mount_path); |
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505 | |
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506 | return RTEMS_IO_ERROR; |
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507 | } |
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508 | |
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509 | memset(&mount_options, 0, sizeof(mount_options)); |
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510 | |
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511 | /* In case this fails, we fall back to use the default converter */ |
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512 | mount_options.converter = rtems_dosfs_create_utf8_converter("CP850"); |
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513 | |
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514 | rv = mount( |
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515 | src, |
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516 | mount_path, |
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517 | RTEMS_FILESYSTEM_TYPE_DOSFS, |
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518 | RTEMS_FILESYSTEM_READ_WRITE, |
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519 | &mount_options |
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520 | ); |
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521 | if (rv != 0) { |
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522 | (void) rmdir(mount_path); |
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523 | free(mount_path); |
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524 | (*mount_options.converter->handler->destroy)(mount_options.converter); |
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525 | |
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526 | return RTEMS_IO_ERROR; |
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527 | } |
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528 | |
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529 | *dest = mount_path; |
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530 | } |
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531 | |
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532 | return RTEMS_SUCCESSFUL; |
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533 | } |
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534 | |
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535 | static rtems_status_code do_mount( |
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536 | const char *src, |
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537 | char **dest_ptr, |
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538 | rtems_media_worker worker, |
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539 | void *worker_arg |
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540 | ) |
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541 | { |
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542 | if (worker == NULL) { |
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543 | worker = mount_worker; |
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544 | } |
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545 | |
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546 | return process_event( |
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547 | RTEMS_MEDIA_EVENT_MOUNT, |
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548 | src, |
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549 | dest_ptr, |
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550 | worker, |
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551 | worker_arg |
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552 | ); |
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553 | } |
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554 | |
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555 | static rtems_status_code do_partition_attach( |
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556 | const char *src, |
---|
557 | char **dest_ptr, |
---|
558 | rtems_media_worker worker, |
---|
559 | void *worker_arg |
---|
560 | ) |
---|
561 | { |
---|
562 | rtems_status_code sc = RTEMS_SUCCESSFUL; |
---|
563 | char *part_path = NULL; |
---|
564 | |
---|
565 | if (worker != NULL) { |
---|
566 | sc = process_event( |
---|
567 | RTEMS_MEDIA_EVENT_PARTITION_ATTACH, |
---|
568 | src, |
---|
569 | &part_path, |
---|
570 | worker, |
---|
571 | worker_arg |
---|
572 | ); |
---|
573 | |
---|
574 | if (sc == RTEMS_SUCCESSFUL) { |
---|
575 | sc = do_mount(part_path, NULL, NULL, NULL); |
---|
576 | } |
---|
577 | } else { |
---|
578 | sc = RTEMS_INVALID_ADDRESS; |
---|
579 | } |
---|
580 | |
---|
581 | if (dest_ptr != NULL && sc == RTEMS_SUCCESSFUL) { |
---|
582 | *dest_ptr = part_path; |
---|
583 | } else { |
---|
584 | free(part_path); |
---|
585 | } |
---|
586 | |
---|
587 | return sc; |
---|
588 | } |
---|
589 | |
---|
590 | static rtems_status_code partition_attach_worker( |
---|
591 | rtems_media_state state, |
---|
592 | const char *src, |
---|
593 | char **dest, |
---|
594 | void *worker_arg |
---|
595 | ) |
---|
596 | { |
---|
597 | rtems_status_code sc = RTEMS_SUCCESSFUL; |
---|
598 | |
---|
599 | if (state == RTEMS_MEDIA_STATE_READY) { |
---|
600 | partition *part = worker_arg; |
---|
601 | char *part_path = rtems_media_append_minor(src, part->index); |
---|
602 | |
---|
603 | if (part_path == NULL) { |
---|
604 | return RTEMS_IO_ERROR; |
---|
605 | } |
---|
606 | |
---|
607 | sc = rtems_blkdev_create_partition( |
---|
608 | part_path, |
---|
609 | src, |
---|
610 | part->begin, |
---|
611 | part->count |
---|
612 | ); |
---|
613 | if (sc != RTEMS_SUCCESSFUL) { |
---|
614 | free(part_path); |
---|
615 | |
---|
616 | return RTEMS_IO_ERROR; |
---|
617 | } |
---|
618 | |
---|
619 | *dest = part_path; |
---|
620 | } |
---|
621 | |
---|
622 | return RTEMS_SUCCESSFUL; |
---|
623 | } |
---|
624 | |
---|
625 | static rtems_status_code attach_and_mount_partitions( |
---|
626 | const char *disk_path, |
---|
627 | const rtems_bdpart_partition *partitions, |
---|
628 | size_t count |
---|
629 | ) |
---|
630 | { |
---|
631 | rtems_status_code sc = RTEMS_SUCCESSFUL; |
---|
632 | size_t i = 0; |
---|
633 | |
---|
634 | for (i = 0; i < count; ++i) { |
---|
635 | partition part_desc = { |
---|
636 | .index = i, |
---|
637 | .begin = partitions [i].begin, |
---|
638 | .count = partitions [i].end - partitions [i].begin |
---|
639 | }; |
---|
640 | char *part_path = NULL; |
---|
641 | |
---|
642 | sc = process_event( |
---|
643 | RTEMS_MEDIA_EVENT_PARTITION_ATTACH, |
---|
644 | disk_path, |
---|
645 | &part_path, |
---|
646 | partition_attach_worker, |
---|
647 | &part_desc |
---|
648 | ); |
---|
649 | |
---|
650 | if (sc == RTEMS_SUCCESSFUL) { |
---|
651 | sc = do_mount(part_path, NULL, NULL, NULL); |
---|
652 | } |
---|
653 | |
---|
654 | free(part_path); |
---|
655 | } |
---|
656 | |
---|
657 | return sc; |
---|
658 | } |
---|
659 | |
---|
660 | static rtems_status_code partition_inquiry_worker( |
---|
661 | rtems_media_state state, |
---|
662 | const char *src, |
---|
663 | char **dest RTEMS_UNUSED, |
---|
664 | void *worker_arg |
---|
665 | ) |
---|
666 | { |
---|
667 | rtems_status_code sc = RTEMS_SUCCESSFUL; |
---|
668 | |
---|
669 | if (state == RTEMS_MEDIA_STATE_READY) { |
---|
670 | partition_table *pt = worker_arg; |
---|
671 | rtems_bdpart_format format; |
---|
672 | |
---|
673 | sc = rtems_bdpart_read(src, &format, pt->partitions, pt->count); |
---|
674 | if (sc != RTEMS_SUCCESSFUL || *pt->count == 0) { |
---|
675 | return RTEMS_IO_ERROR; |
---|
676 | } |
---|
677 | } |
---|
678 | |
---|
679 | return RTEMS_SUCCESSFUL; |
---|
680 | } |
---|
681 | |
---|
682 | static rtems_status_code do_partition_inquiry( |
---|
683 | const char *src, |
---|
684 | char **dest_ptr, |
---|
685 | rtems_media_worker worker, |
---|
686 | void *worker_arg |
---|
687 | ) |
---|
688 | { |
---|
689 | rtems_status_code sc = RTEMS_SUCCESSFUL; |
---|
690 | |
---|
691 | if (worker == NULL) { |
---|
692 | rtems_bdpart_partition partitions [RTEMS_BDPART_PARTITION_NUMBER_HINT]; |
---|
693 | size_t count = RTEMS_BDPART_PARTITION_NUMBER_HINT; |
---|
694 | partition_table pt = { |
---|
695 | .partitions = partitions, |
---|
696 | .count = &count |
---|
697 | }; |
---|
698 | |
---|
699 | sc = process_event( |
---|
700 | RTEMS_MEDIA_EVENT_PARTITION_INQUIRY, |
---|
701 | src, |
---|
702 | dest_ptr, |
---|
703 | partition_inquiry_worker, |
---|
704 | &pt |
---|
705 | ); |
---|
706 | |
---|
707 | if (sc == RTEMS_SUCCESSFUL) { |
---|
708 | sc = attach_and_mount_partitions(src, partitions, count); |
---|
709 | } |
---|
710 | } else { |
---|
711 | sc = process_event( |
---|
712 | RTEMS_MEDIA_EVENT_PARTITION_INQUIRY, |
---|
713 | src, |
---|
714 | dest_ptr, |
---|
715 | worker, |
---|
716 | worker_arg |
---|
717 | ); |
---|
718 | } |
---|
719 | |
---|
720 | return sc; |
---|
721 | } |
---|
722 | |
---|
723 | static rtems_status_code do_disk_attach( |
---|
724 | const char *src, |
---|
725 | char **dest_ptr, |
---|
726 | rtems_media_worker worker, |
---|
727 | void *worker_arg |
---|
728 | ) |
---|
729 | { |
---|
730 | rtems_status_code sc = RTEMS_SUCCESSFUL; |
---|
731 | rtems_status_code rsc = RTEMS_SUCCESSFUL; |
---|
732 | char *disk_path = NULL; |
---|
733 | |
---|
734 | if (worker != NULL) { |
---|
735 | rsc = process_event( |
---|
736 | RTEMS_MEDIA_EVENT_DISK_ATTACH, |
---|
737 | src, |
---|
738 | &disk_path, |
---|
739 | worker, |
---|
740 | worker_arg |
---|
741 | ); |
---|
742 | |
---|
743 | if (rsc == RTEMS_SUCCESSFUL) { |
---|
744 | sc = do_mount(disk_path, NULL, NULL, NULL); |
---|
745 | |
---|
746 | if (sc != RTEMS_SUCCESSFUL) { |
---|
747 | do_partition_inquiry(disk_path, NULL, NULL, NULL); |
---|
748 | } |
---|
749 | } |
---|
750 | } else { |
---|
751 | rsc = RTEMS_INVALID_ADDRESS; |
---|
752 | } |
---|
753 | |
---|
754 | if (dest_ptr != NULL && rsc == RTEMS_SUCCESSFUL) { |
---|
755 | *dest_ptr = disk_path; |
---|
756 | } else { |
---|
757 | free(disk_path); |
---|
758 | } |
---|
759 | |
---|
760 | return rsc; |
---|
761 | } |
---|
762 | |
---|
763 | static rtems_status_code unmount_worker( |
---|
764 | rtems_media_state state, |
---|
765 | const char *src, |
---|
766 | char **dest RTEMS_UNUSED, |
---|
767 | void *worker_arg RTEMS_UNUSED |
---|
768 | ) |
---|
769 | { |
---|
770 | rtems_status_code sc = RTEMS_SUCCESSFUL; |
---|
771 | |
---|
772 | if (state == RTEMS_MEDIA_STATE_READY) { |
---|
773 | int rv = unmount(src); |
---|
774 | |
---|
775 | if (rv == 0) { |
---|
776 | rv = rmdir(src); |
---|
777 | if (rv != 0) { |
---|
778 | sc = RTEMS_IO_ERROR; |
---|
779 | } |
---|
780 | } else { |
---|
781 | sc = RTEMS_IO_ERROR; |
---|
782 | } |
---|
783 | } |
---|
784 | |
---|
785 | return sc; |
---|
786 | } |
---|
787 | |
---|
788 | static rtems_status_code do_unmount( |
---|
789 | const char *src, |
---|
790 | char **dest_ptr, |
---|
791 | rtems_media_worker worker, |
---|
792 | void *worker_arg |
---|
793 | ) |
---|
794 | { |
---|
795 | if (worker == NULL) { |
---|
796 | worker = unmount_worker; |
---|
797 | worker_arg = NULL; |
---|
798 | } |
---|
799 | |
---|
800 | return process_event( |
---|
801 | RTEMS_MEDIA_EVENT_UNMOUNT, |
---|
802 | src, |
---|
803 | dest_ptr, |
---|
804 | worker, |
---|
805 | worker_arg |
---|
806 | ); |
---|
807 | } |
---|
808 | |
---|
809 | static rtems_status_code disk_detach_worker( |
---|
810 | rtems_media_state state, |
---|
811 | const char *src, |
---|
812 | char **dest RTEMS_UNUSED, |
---|
813 | void *worker_arg RTEMS_UNUSED |
---|
814 | ) |
---|
815 | { |
---|
816 | rtems_status_code rsc = RTEMS_SUCCESSFUL; |
---|
817 | |
---|
818 | if (state == RTEMS_MEDIA_STATE_READY) { |
---|
819 | int rv = unlink(src); |
---|
820 | |
---|
821 | if (rv != 0) { |
---|
822 | rsc = RTEMS_IO_ERROR; |
---|
823 | } |
---|
824 | } |
---|
825 | |
---|
826 | return rsc; |
---|
827 | } |
---|
828 | |
---|
829 | static rtems_status_code detach_item(rtems_media_event event, media_item *item) |
---|
830 | { |
---|
831 | rtems_status_code sc = RTEMS_SUCCESSFUL; |
---|
832 | rtems_status_code rsc = RTEMS_SUCCESSFUL; |
---|
833 | |
---|
834 | if (item->mount_path != NULL) { |
---|
835 | sc = do_unmount(item->mount_path, NULL, NULL, NULL); |
---|
836 | if (sc != RTEMS_SUCCESSFUL) { |
---|
837 | rsc = RTEMS_IO_ERROR; |
---|
838 | } |
---|
839 | } |
---|
840 | |
---|
841 | sc = process_event(event, item->disk_path, NULL, disk_detach_worker, NULL); |
---|
842 | if (sc != RTEMS_SUCCESSFUL) { |
---|
843 | rsc = RTEMS_IO_ERROR; |
---|
844 | } |
---|
845 | |
---|
846 | return rsc; |
---|
847 | } |
---|
848 | |
---|
849 | static rtems_status_code detach_parent_item(media_item *parent) |
---|
850 | { |
---|
851 | rtems_status_code sc = RTEMS_SUCCESSFUL; |
---|
852 | rtems_status_code rsc = RTEMS_SUCCESSFUL; |
---|
853 | |
---|
854 | rtems_chain_node *node = rtems_chain_first(&media_item_chain); |
---|
855 | |
---|
856 | while (!rtems_chain_is_tail(&media_item_chain, node)) { |
---|
857 | media_item *child = (media_item *) node; |
---|
858 | |
---|
859 | node = rtems_chain_next(node); |
---|
860 | |
---|
861 | if (child->parent == parent) { |
---|
862 | sc = detach_item(RTEMS_MEDIA_EVENT_PARTITION_DETACH, child); |
---|
863 | if (sc != RTEMS_SUCCESSFUL) { |
---|
864 | rsc = RTEMS_IO_ERROR; |
---|
865 | } |
---|
866 | } |
---|
867 | } |
---|
868 | |
---|
869 | sc = detach_item(RTEMS_MEDIA_EVENT_DISK_DETACH, parent); |
---|
870 | if (sc != RTEMS_SUCCESSFUL) { |
---|
871 | rsc = RTEMS_IO_ERROR; |
---|
872 | } |
---|
873 | |
---|
874 | return rsc; |
---|
875 | } |
---|
876 | |
---|
877 | static rtems_status_code do_disk_detach( |
---|
878 | const char *src, |
---|
879 | char **dest_ptr, |
---|
880 | rtems_media_worker worker, |
---|
881 | void *worker_arg |
---|
882 | ) |
---|
883 | { |
---|
884 | if (worker == NULL) { |
---|
885 | media_item *parent = get_media_item(src, NULL); |
---|
886 | |
---|
887 | if (parent != NULL) { |
---|
888 | return detach_parent_item(parent); |
---|
889 | } |
---|
890 | |
---|
891 | worker = disk_detach_worker; |
---|
892 | worker_arg = NULL; |
---|
893 | } |
---|
894 | |
---|
895 | return process_event( |
---|
896 | RTEMS_MEDIA_EVENT_DISK_DETACH, |
---|
897 | src, |
---|
898 | dest_ptr, |
---|
899 | worker, |
---|
900 | worker_arg |
---|
901 | ); |
---|
902 | } |
---|
903 | |
---|
904 | static rtems_status_code do_partition_detach( |
---|
905 | const char *src, |
---|
906 | char **dest_ptr, |
---|
907 | rtems_media_worker worker, |
---|
908 | void *worker_arg |
---|
909 | ) |
---|
910 | { |
---|
911 | if (worker == NULL) { |
---|
912 | media_item *item = get_media_item(src, NULL); |
---|
913 | |
---|
914 | if (item != NULL) { |
---|
915 | return detach_item(RTEMS_MEDIA_EVENT_PARTITION_DETACH, item); |
---|
916 | } |
---|
917 | |
---|
918 | worker = disk_detach_worker; |
---|
919 | worker_arg = NULL; |
---|
920 | } |
---|
921 | |
---|
922 | return process_event( |
---|
923 | RTEMS_MEDIA_EVENT_PARTITION_DETACH, |
---|
924 | src, |
---|
925 | dest_ptr, |
---|
926 | worker, |
---|
927 | worker_arg |
---|
928 | ); |
---|
929 | } |
---|
930 | |
---|
931 | rtems_status_code rtems_media_post_event( |
---|
932 | rtems_media_event event, |
---|
933 | const char *src, |
---|
934 | char **dest_ptr, |
---|
935 | rtems_media_worker worker, |
---|
936 | void *worker_arg |
---|
937 | ) |
---|
938 | { |
---|
939 | rtems_status_code sc = RTEMS_SUCCESSFUL; |
---|
940 | |
---|
941 | lock(); |
---|
942 | |
---|
943 | switch (event) { |
---|
944 | case RTEMS_MEDIA_EVENT_DISK_ATTACH: |
---|
945 | sc = do_disk_attach(src, dest_ptr, worker, worker_arg); |
---|
946 | break; |
---|
947 | case RTEMS_MEDIA_EVENT_DISK_DETACH: |
---|
948 | sc = do_disk_detach(src, dest_ptr, worker, worker_arg); |
---|
949 | break; |
---|
950 | case RTEMS_MEDIA_EVENT_MOUNT: |
---|
951 | sc = do_mount(src, dest_ptr, worker, worker_arg); |
---|
952 | break; |
---|
953 | case RTEMS_MEDIA_EVENT_UNMOUNT: |
---|
954 | sc = do_unmount(src, dest_ptr, worker, worker_arg); |
---|
955 | break; |
---|
956 | case RTEMS_MEDIA_EVENT_PARTITION_INQUIRY: |
---|
957 | sc = do_partition_inquiry(src, dest_ptr, worker, worker_arg); |
---|
958 | break; |
---|
959 | case RTEMS_MEDIA_EVENT_PARTITION_ATTACH: |
---|
960 | sc = do_partition_attach(src, dest_ptr, worker, worker_arg); |
---|
961 | break; |
---|
962 | case RTEMS_MEDIA_EVENT_PARTITION_DETACH: |
---|
963 | sc = do_partition_detach(src, dest_ptr, worker, worker_arg); |
---|
964 | break; |
---|
965 | default: |
---|
966 | sc = RTEMS_INVALID_ID; |
---|
967 | break; |
---|
968 | } |
---|
969 | |
---|
970 | unlock(); |
---|
971 | |
---|
972 | return sc; |
---|
973 | } |
---|