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<div class="title">vfs.c</div> </div>
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<a href="vfs_8c.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span> <span class="comment">/*-</span></div>
<div class="line"><a name="l00002"></a><span class="lineno"> 2</span> <span class="comment"> * Copyright (c) 2002-2018 The UbixOS Project.</span></div>
<div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="comment"> * All rights reserved.</span></div>
<div class="line"><a name="l00004"></a><span class="lineno"> 4</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="comment"> * This was developed by Christopher W. Olsen for the UbixOS Project.</span></div>
<div class="line"><a name="l00006"></a><span class="lineno"> 6</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="comment"> * Redistribution and use in source and binary forms, with or without modification, are permitted</span></div>
<div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="comment"> * provided that the following conditions are met:</span></div>
<div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="comment"> * 1) Redistributions of source code must retain the above copyright notice, this list of</span></div>
<div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="comment"> * conditions, the following disclaimer and the list of authors.</span></div>
<div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="comment"> * 2) Redistributions in binary form must reproduce the above copyright notice, this list of</span></div>
<div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="comment"> * conditions, the following disclaimer and the list of authors in the documentation and/or</span></div>
<div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="comment"> * other materials provided with the distribution.</span></div>
<div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="comment"> * 3) Neither the name of the UbixOS Project nor the names of its contributors may be used to</span></div>
<div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="comment"> * endorse or promote products derived from this software without specific prior written</span></div>
<div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <span class="comment"> * permission.</span></div>
<div class="line"><a name="l00018"></a><span class="lineno"> 18</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00019"></a><span class="lineno"> 19</span> <span class="comment"> * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED</span></div>
<div class="line"><a name="l00020"></a><span class="lineno"> 20</span> <span class="comment"> * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS</span></div>
<div class="line"><a name="l00021"></a><span class="lineno"> 21</span> <span class="comment"> * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS</span></div>
<div class="line"><a name="l00022"></a><span class="lineno"> 22</span> <span class="comment"> * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES</span></div>
<div class="line"><a name="l00023"></a><span class="lineno"> 23</span> <span class="comment"> * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,</span></div>
<div class="line"><a name="l00024"></a><span class="lineno"> 24</span> <span class="comment"> * OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN</span></div>
<div class="line"><a name="l00025"></a><span class="lineno"> 25</span> <span class="comment"> * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT</span></div>
<div class="line"><a name="l00026"></a><span class="lineno"> 26</span> <span class="comment"> * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.</span></div>
<div class="line"><a name="l00027"></a><span class="lineno"> 27</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00028"></a><span class="lineno"> 28</span>  </div>
<div class="line"><a name="l00029"></a><span class="lineno"> 29</span> <span class="preprocessor">#include <<a class="code" href="include_2vfs_2vfs_8h.html">vfs/vfs.h</a>></span></div>
<div class="line"><a name="l00030"></a><span class="lineno"> 30</span> <span class="preprocessor">#include <<a class="code" href="vitals_8h.html">ubixos/vitals.h</a>></span></div>
<div class="line"><a name="l00031"></a><span class="lineno"> 31</span> <span class="preprocessor">#include <<a class="code" href="kmalloc_8h.html">lib/kmalloc.h</a>></span></div>
<div class="line"><a name="l00032"></a><span class="lineno"> 32</span> <span class="preprocessor">#include <<a class="code" href="kprintf_8h.html">lib/kprintf.h</a>></span></div>
<div class="line"><a name="l00033"></a><span class="lineno"> 33</span> <span class="preprocessor">#include <<a class="code" href="string_8h.html">string.h</a>></span></div>
<div class="line"><a name="l00034"></a><span class="lineno"> 34</span> <span class="preprocessor">#include <<a class="code" href="descrip_8h.html">sys/descrip.h</a>></span></div>
<div class="line"><a name="l00035"></a><span class="lineno"> 35</span>  </div>
<div class="line"><a name="l00036"></a><span class="lineno"> 36</span> <span class="comment">/************************************************************************</span></div>
<div class="line"><a name="l00037"></a><span class="lineno"> 37</span> <span class="comment"></span> </div>
<div class="line"><a name="l00038"></a><span class="lineno"> 38</span> <span class="comment">Function: void vfs_init();</span></div>
<div class="line"><a name="l00039"></a><span class="lineno"> 39</span> <span class="comment"></span> </div>
<div class="line"><a name="l00040"></a><span class="lineno"> 40</span> <span class="comment">Description: This Function Initializes The VFS Layer</span></div>
<div class="line"><a name="l00041"></a><span class="lineno"> 41</span> <span class="comment"></span> </div>
<div class="line"><a name="l00042"></a><span class="lineno"> 42</span> <span class="comment">Notes:</span></div>
<div class="line"><a name="l00043"></a><span class="lineno"> 43</span> <span class="comment"></span> </div>
<div class="line"><a name="l00044"></a><span class="lineno"> 44</span> <span class="comment">02/20/2004 - Approved for quality</span></div>
<div class="line"><a name="l00045"></a><span class="lineno"> 45</span> <span class="comment"></span> </div>
<div class="line"><a name="l00046"></a><span class="lineno"><a class="line" href="include_2vfs_2vfs_8h.html#aca585ca14c08d6c1a07e1b886fc9749a"> 46</a></span> <span class="comment">************************************************************************/</span></div>
<div class="line"><a name="l00047"></a><span class="lineno"> 47</span> <span class="keywordtype">int</span> <a class="code" href="vfs_8c.html#aca585ca14c08d6c1a07e1b886fc9749a">vfs_init</a>() {</div>
<div class="line"><a name="l00048"></a><span class="lineno"> 48</span>  <span class="comment">/* Set up default fileSystems list */</span></div>
<div class="line"><a name="l00049"></a><span class="lineno"> 49</span>  <a class="code" href="vitals_8h.html#a67aae71be472453526fc1a0bfbf80280">systemVitals</a>-><a class="code" href="structvitalsStruct.html#a549507320bf8045f24ddf245e92777bd">fileSystems</a> = 0x0;</div>
<div class="line"><a name="l00050"></a><span class="lineno"> 50</span>  </div>
<div class="line"><a name="l00051"></a><span class="lineno"> 51</span>  <span class="comment">/* Print information */</span></div>
<div class="line"><a name="l00052"></a><span class="lineno"> 52</span>  <a class="code" href="kprintf_8h.html#a20b56810edb62a6fe59917015c30848f">kprintf</a>(<span class="stringliteral">"vfs0: loaded at address: [0x%X]\n"</span>,<a class="code" href="vitals_8h.html#a67aae71be472453526fc1a0bfbf80280">systemVitals</a>-><a class="code" href="structvitalsStruct.html#a549507320bf8045f24ddf245e92777bd">fileSystems</a>);</div>
<div class="line"><a name="l00053"></a><span class="lineno"> 53</span>  </div>
<div class="line"><a name="l00054"></a><span class="lineno"> 54</span>  <span class="comment">/* Return so we know things went well */</span></div>
<div class="line"><a name="l00055"></a><span class="lineno"> 55</span>  <span class="keywordflow">return</span>(0x0);</div>
<div class="line"><a name="l00056"></a><span class="lineno"> 56</span>  }</div>
<div class="line"><a name="l00057"></a><span class="lineno"><a class="line" href="vfs_8c.html#ac49aa10a62b250834a055476c849b7b3"> 57</a></span>  </div>
<div class="line"><a name="l00058"></a><span class="lineno"> 58</span> <span class="keyword">struct </span><a class="code" href="structfileSystem.html">fileSystem</a> *<a class="code" href="vfs_8c.html#ac49aa10a62b250834a055476c849b7b3">vfsFindFS</a>(<span class="keywordtype">int</span> <a class="code" href="structfileSystem.html#aa1b7987f710ba203dffb15590ff58ce0">vfsType</a>) {</div>
<div class="line"><a name="l00059"></a><span class="lineno"> 59</span>  <span class="keyword">struct </span><a class="code" href="structfileSystem.html">fileSystem</a> *tmp = 0x0;</div>
<div class="line"><a name="l00060"></a><span class="lineno"> 60</span>  </div>
<div class="line"><a name="l00061"></a><span class="lineno"> 61</span>  <span class="comment">/* Search For File System */</span></div>
<div class="line"><a name="l00062"></a><span class="lineno"> 62</span>  <span class="keywordflow">for</span> (tmp=<a class="code" href="vitals_8h.html#a67aae71be472453526fc1a0bfbf80280">systemVitals</a>-><a class="code" href="structvitalsStruct.html#a549507320bf8045f24ddf245e92777bd">fileSystems</a>;tmp;tmp=tmp-><a class="code" href="structfileSystem.html#aa53ac2dce5c23d729ca2e49907a542de">next</a>) {</div>
<div class="line"><a name="l00063"></a><span class="lineno"> 63</span>  <span class="comment">/* If Found Return File System */</span></div>
<div class="line"><a name="l00064"></a><span class="lineno"> 64</span>  <span class="keywordflow">if</span> (tmp-><a class="code" href="structfileSystem.html#aa1b7987f710ba203dffb15590ff58ce0">vfsType</a> == <a class="code" href="structfileSystem.html#aa1b7987f710ba203dffb15590ff58ce0">vfsType</a>) {</div>
<div class="line"><a name="l00065"></a><span class="lineno"> 65</span>  <span class="keywordflow">return</span>(tmp);</div>
<div class="line"><a name="l00066"></a><span class="lineno"> 66</span>  }</div>
<div class="line"><a name="l00067"></a><span class="lineno"> 67</span>  }</div>
<div class="line"><a name="l00068"></a><span class="lineno"> 68</span>  </div>
<div class="line"><a name="l00069"></a><span class="lineno"> 69</span>  <span class="comment">/* If FS Not Found Return NULL */</span></div>
<div class="line"><a name="l00070"></a><span class="lineno"> 70</span>  <span class="keywordflow">return</span>(0x0);</div>
<div class="line"><a name="l00071"></a><span class="lineno"> 71</span>  }</div>
<div class="line"><a name="l00072"></a><span class="lineno"> 72</span>  </div>
<div class="line"><a name="l00080"></a><span class="lineno"> 80</span> <span class="keywordtype">int</span> <a class="code" href="vfs_8c.html#ad8cb9693ae7b6b9fc419efc975778338">vfsRegisterFS</a>(<span class="keyword">struct</span> <a class="code" href="structfileSystem.html">fileSystem</a> newFS) {</div>
<div class="line"><a name="l00081"></a><span class="lineno"> 81</span> <span class="comment">/*</span></div>
<div class="line"><a name="l00082"></a><span class="lineno"> 82</span> <span class="comment">int vfsType,</span></div>
<div class="line"><a name="l00083"></a><span class="lineno"> 83</span> <span class="comment">void *vfsInitFS,</span></div>
<div class="line"><a name="l00084"></a><span class="lineno"> 84</span> <span class="comment">void *vfsRead,</span></div>
<div class="line"><a name="l00085"></a><span class="lineno"> 85</span> <span class="comment">void *vfsWrite,</span></div>
<div class="line"><a name="l00086"></a><span class="lineno"> 86</span> <span class="comment">void *vfsOpenFile,</span></div>
<div class="line"><a name="l00087"></a><span class="lineno"> 87</span> <span class="comment">void *vfsUnlink,</span></div>
<div class="line"><a name="l00088"></a><span class="lineno"> 88</span> <span class="comment">void *vfsMakeDir,</span></div>
<div class="line"><a name="l00089"></a><span class="lineno"> 89</span> <span class="comment">void *vfsRemDir,</span></div>
<div class="line"><a name="l00090"></a><span class="lineno"> 90</span> <span class="comment">void *vfsSync) {</span></div>
<div class="line"><a name="l00091"></a><span class="lineno"> 91</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00092"></a><span class="lineno"> 92</span>  <span class="keyword">struct </span><a class="code" href="structfileSystem.html">fileSystem</a> *tmpFs = 0x0;</div>
<div class="line"><a name="l00093"></a><span class="lineno"> 93</span>  </div>
<div class="line"><a name="l00094"></a><span class="lineno"> 94</span>  <span class="keywordflow">if</span> (<a class="code" href="vfs_8c.html#ac49aa10a62b250834a055476c849b7b3">vfsFindFS</a>(newFS.<a class="code" href="structfileSystem.html#aa1b7987f710ba203dffb15590ff58ce0">vfsType</a>) != 0x0) {</div>
<div class="line"><a name="l00095"></a><span class="lineno"> 95</span>  <a class="code" href="kprintf_8h.html#a20b56810edb62a6fe59917015c30848f">kprintf</a>(<span class="stringliteral">"FS Is already Registered\n"</span>);</div>
<div class="line"><a name="l00096"></a><span class="lineno"> 96</span>  <span class="keywordflow">return</span>(0x1);</div>
<div class="line"><a name="l00097"></a><span class="lineno"> 97</span>  }</div>
<div class="line"><a name="l00098"></a><span class="lineno"> 98</span>  </div>
<div class="line"><a name="l00099"></a><span class="lineno"> 99</span>  <span class="comment">/* Allocate Memory */</span></div>
<div class="line"><a name="l00100"></a><span class="lineno"> 100</span>  tmpFs = (<span class="keyword">struct </span><a class="code" href="structfileSystem.html">fileSystem</a> *)<a class="code" href="kmalloc_8h.html#a150eab2ac4ce4553e21ca10e7f441762">kmalloc</a>(<span class="keyword">sizeof</span>(<span class="keyword">struct</span> <a class="code" href="structfileSystem.html">fileSystem</a>));</div>
<div class="line"><a name="l00101"></a><span class="lineno"> 101</span>  <span class="keywordflow">if</span> (tmpFs == <a class="code" href="fat__string_8h.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>) {</div>
<div class="line"><a name="l00102"></a><span class="lineno"> 102</span>  <a class="code" href="kprintf_8h.html#a20b56810edb62a6fe59917015c30848f">kprintf</a>(<span class="stringliteral">"vfsRegisterFS: memory allocation failed\n"</span>);</div>
<div class="line"><a name="l00103"></a><span class="lineno"> 103</span>  <span class="comment">/* Memory Allocation Failed */</span></div>
<div class="line"><a name="l00104"></a><span class="lineno"> 104</span>  <span class="keywordflow">return</span>(0x1);</div>
<div class="line"><a name="l00105"></a><span class="lineno"> 105</span>  }</div>
<div class="line"><a name="l00106"></a><span class="lineno"> 106</span>  </div>
<div class="line"><a name="l00107"></a><span class="lineno"> 107</span>  <span class="comment">/* Set Up FS Defaults */</span></div>
<div class="line"><a name="l00108"></a><span class="lineno"> 108</span>  </div>
<div class="line"><a name="l00109"></a><span class="lineno"> 109</span> <span class="comment">/* 2004 7-16-2004 mji</span></div>
<div class="line"><a name="l00110"></a><span class="lineno"> 110</span> <span class="comment"> * Old method:</span></div>
<div class="line"><a name="l00111"></a><span class="lineno"> 111</span> <span class="comment"> * tmpFs->vfsType = newFS.vfsType;</span></div>
<div class="line"><a name="l00112"></a><span class="lineno"> 112</span> <span class="comment"> * tmpFs->vfsInitFS = newFS.vfsInitFS;</span></div>
<div class="line"><a name="l00113"></a><span class="lineno"> 113</span> <span class="comment"> * tmpFs->vfsRead = newFS.vfsRead;</span></div>
<div class="line"><a name="l00114"></a><span class="lineno"> 114</span> <span class="comment"> * tmpFs->vfsWrite = newFS.vfsWrite;</span></div>
<div class="line"><a name="l00115"></a><span class="lineno"> 115</span> <span class="comment"> * tmpFs->vfsOpenFile = newFS.vfsOpenFile;</span></div>
<div class="line"><a name="l00116"></a><span class="lineno"> 116</span> <span class="comment"> * tmpFs->vfsUnlink = newFS.vfsUnlink;</span></div>
<div class="line"><a name="l00117"></a><span class="lineno"> 117</span> <span class="comment"> * tmpFs->vfsMakeDir = newFS.vfsMakeDir;</span></div>
<div class="line"><a name="l00118"></a><span class="lineno"> 118</span> <span class="comment"> * tmpFs->vfsRemDir = newFS.vfsRemDir;</span></div>
<div class="line"><a name="l00119"></a><span class="lineno"> 119</span> <span class="comment"> * tmpFs->vfsSync = newFS.vfsSync;</span></div>
<div class="line"><a name="l00120"></a><span class="lineno"> 120</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00121"></a><span class="lineno"> 121</span>  <span class="comment">/* new method: */</span></div>
<div class="line"><a name="l00122"></a><span class="lineno"> 122</span>  </div>
<div class="line"><a name="l00123"></a><span class="lineno"> 123</span>  <a class="code" href="string_8h.html#ae33b18edb618c656b9b795b9fce2316c">memcpy</a>(tmpFs, &newFS, <span class="keyword">sizeof</span>(<span class="keyword">struct</span> <a class="code" href="structfileSystem.html">fileSystem</a>));</div>
<div class="line"><a name="l00124"></a><span class="lineno"> 124</span>  <span class="keywordflow">if</span> (!<a class="code" href="vitals_8h.html#a67aae71be472453526fc1a0bfbf80280">systemVitals</a>-><a class="code" href="structvitalsStruct.html#a549507320bf8045f24ddf245e92777bd">fileSystems</a>) {</div>
<div class="line"><a name="l00125"></a><span class="lineno"> 125</span>  tmpFs-><a class="code" href="structfileSystem.html#a385cd52ba55b3ed318ee54f3f42b5a54">prev</a> = 0x0;</div>
<div class="line"><a name="l00126"></a><span class="lineno"> 126</span>  tmpFs-><a class="code" href="structfileSystem.html#aa53ac2dce5c23d729ca2e49907a542de">next</a> = 0x0;</div>
<div class="line"><a name="l00127"></a><span class="lineno"> 127</span>  <a class="code" href="vitals_8h.html#a67aae71be472453526fc1a0bfbf80280">systemVitals</a>-><a class="code" href="structvitalsStruct.html#a549507320bf8045f24ddf245e92777bd">fileSystems</a> = tmpFs;</div>
<div class="line"><a name="l00128"></a><span class="lineno"> 128</span>  }</div>
<div class="line"><a name="l00129"></a><span class="lineno"> 129</span>  <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00130"></a><span class="lineno"> 130</span>  tmpFs-><a class="code" href="structfileSystem.html#a385cd52ba55b3ed318ee54f3f42b5a54">prev</a> = 0x0;</div>
<div class="line"><a name="l00131"></a><span class="lineno"> 131</span>  tmpFs-><a class="code" href="structfileSystem.html#aa53ac2dce5c23d729ca2e49907a542de">next</a> = <a class="code" href="vitals_8h.html#a67aae71be472453526fc1a0bfbf80280">systemVitals</a>-><a class="code" href="structvitalsStruct.html#a549507320bf8045f24ddf245e92777bd">fileSystems</a>;</div>
<div class="line"><a name="l00132"></a><span class="lineno"> 132</span>  <a class="code" href="vitals_8h.html#a67aae71be472453526fc1a0bfbf80280">systemVitals</a>-><a class="code" href="structvitalsStruct.html#a549507320bf8045f24ddf245e92777bd">fileSystems</a>-><a class="code" href="structfileSystem.html#a385cd52ba55b3ed318ee54f3f42b5a54">prev</a> = tmpFs;</div>
<div class="line"><a name="l00133"></a><span class="lineno"> 133</span>  <a class="code" href="vitals_8h.html#a67aae71be472453526fc1a0bfbf80280">systemVitals</a>-><a class="code" href="structvitalsStruct.html#a549507320bf8045f24ddf245e92777bd">fileSystems</a> = tmpFs;</div>
<div class="line"><a name="l00134"></a><span class="lineno"> 134</span>  }</div>
<div class="line"><a name="l00135"></a><span class="lineno"> 135</span>  </div>
<div class="line"><a name="l00136"></a><span class="lineno"> 136</span>  <span class="keywordflow">return</span>(0x0);</div>
<div class="line"><a name="l00137"></a><span class="lineno"> 137</span>  }</div>
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