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<a class="el" href="dir_897b6a2d7bab147dd1db58381aad3984.html">src</a> » <a class="el" href="dir_832905b1f7f5feaf61a306b40c0ac817.html">sys</a> » <a class="el" href="dir_366cae809cefebd9796e1be555536f38.html">vfs</a></div>
<h1>vfs.c</h1><a href="vfs_8c.html">Go to the documentation of this file.</a><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">/*****************************************************************************************</span>
<a name="l00002"></a>00002 <span class="comment"> Copyright (c) 2002-2004 The UbixOS Project</span>
<a name="l00003"></a>00003 <span class="comment"> All rights reserved.</span>
<a name="l00004"></a>00004 <span class="comment"></span>
<a name="l00005"></a>00005 <span class="comment"> Redistribution and use in source and binary forms, with or without modification, are</span>
<a name="l00006"></a>00006 <span class="comment"> permitted provided that the following conditions are met:</span>
<a name="l00007"></a>00007 <span class="comment"></span>
<a name="l00008"></a>00008 <span class="comment"> Redistributions of source code must retain the above copyright notice, this list of</span>
<a name="l00009"></a>00009 <span class="comment"> conditions, the following disclaimer and the list of authors. Redistributions in binary</span>
<a name="l00010"></a>00010 <span class="comment"> form must reproduce the above copyright notice, this list of conditions, the following</span>
<a name="l00011"></a>00011 <span class="comment"> disclaimer and the list of authors in the documentation and/or other materials provided</span>
<a name="l00012"></a>00012 <span class="comment"> with the distribution. Neither the name of the UbixOS Project nor the names of its</span>
<a name="l00013"></a>00013 <span class="comment"> contributors may be used to endorse or promote products derived from this software</span>
<a name="l00014"></a>00014 <span class="comment"> without specific prior written permission.</span>
<a name="l00015"></a>00015 <span class="comment"></span>
<a name="l00016"></a>00016 <span class="comment"> THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY</span>
<a name="l00017"></a>00017 <span class="comment"> EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF</span>
<a name="l00018"></a>00018 <span class="comment"> MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL</span>
<a name="l00019"></a>00019 <span class="comment"> THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,</span>
<a name="l00020"></a>00020 <span class="comment"> SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT</span>
<a name="l00021"></a>00021 <span class="comment"> OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)</span>
<a name="l00022"></a>00022 <span class="comment"> HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR</span>
<a name="l00023"></a>00023 <span class="comment"> TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS</span>
<a name="l00024"></a>00024 <span class="comment"> SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.</span>
<a name="l00025"></a>00025 <span class="comment"></span>
<a name="l00026"></a>00026 <span class="comment"> $Id: vfs_8c-source.html 88 2016-01-12 00:11:29Z reddawg $</span>
<a name="l00027"></a>00027 <span class="comment"></span>
<a name="l00028"></a>00028 <span class="comment">*****************************************************************************************/</span>
<a name="l00029"></a>00029
<a name="l00030"></a>00030 <span class="preprocessor">#include <<a class="code" href="vfs_8h.html">vfs/vfs.h</a>></span>
<a name="l00031"></a>00031 <span class="preprocessor">#include <<a class="code" href="vitals_8h.html">ubixos/vitals.h</a>></span>
<a name="l00032"></a>00032 <span class="preprocessor">#include <<a class="code" href="kmalloc_8h.html">lib/kmalloc.h</a>></span>
<a name="l00033"></a>00033 <span class="preprocessor">#include <<a class="code" href="kprintf_8h.html">lib/kprintf.h</a>></span>
<a name="l00034"></a>00034 <span class="preprocessor">#include <<a class="code" href="lib_2string_8h.html">lib/string.h</a>></span>
<a name="l00035"></a>00035 <span class="preprocessor">#include <<a class="code" href="kern__descrip_8h.html">sys/kern_descrip.h</a>></span>
<a name="l00036"></a>00036
<a name="l00037"></a>00037 <span class="comment">/************************************************************************</span>
<a name="l00038"></a>00038 <span class="comment"></span>
<a name="l00039"></a>00039 <span class="comment">Function: void vfs_init();</span>
<a name="l00040"></a>00040 <span class="comment"></span>
<a name="l00041"></a>00041 <span class="comment">Description: This Function Initializes The VFS Layer</span>
<a name="l00042"></a>00042 <span class="comment"></span>
<a name="l00043"></a>00043 <span class="comment">Notes:</span>
<a name="l00044"></a>00044 <span class="comment"></span>
<a name="l00045"></a>00045 <span class="comment">02/20/2004 - Approved for quality</span>
<a name="l00046"></a>00046 <span class="comment"></span>
<a name="l00047"></a>00047 <span class="comment">************************************************************************/</span>
<a name="l00048"></a><a class="code" href="vfs_8c.html#ca585ca14c08d6c1a07e1b886fc9749a">00048</a> <span class="keywordtype">int</span> <a class="code" href="vfs_8h.html#ca585ca14c08d6c1a07e1b886fc9749a">vfs_init</a>() {
<a name="l00049"></a>00049 <span class="comment">/* Set up default fileSystems list */</span>
<a name="l00050"></a>00050 <a class="code" href="vitals_8h.html#67aae71be472453526fc1a0bfbf80280">systemVitals</a>-><a class="code" href="structvitalsStruct.html#549507320bf8045f24ddf245e92777bd">fileSystems</a> = 0x0;
<a name="l00051"></a>00051
<a name="l00052"></a>00052 <span class="comment">/* Print information */</span>
<a name="l00053"></a>00053 <a class="code" href="kprint_8h.html#b2761bdf0cca73ad0fb5880895210cd8">kprintf</a>(<span class="stringliteral">"vfs0: loaded at address: [0x%X]\n"</span>,<a class="code" href="vitals_8h.html#67aae71be472453526fc1a0bfbf80280">systemVitals</a>-><a class="code" href="structvitalsStruct.html#549507320bf8045f24ddf245e92777bd">fileSystems</a>);
<a name="l00054"></a>00054
<a name="l00055"></a>00055 <span class="comment">/* Return so we know things went well */</span>
<a name="l00056"></a>00056 <span class="keywordflow">return</span>(0x0);
<a name="l00057"></a>00057 }
<a name="l00058"></a>00058
<a name="l00059"></a><a class="code" href="vfs_8c.html#c49aa10a62b250834a055476c849b7b3">00059</a> <span class="keyword">struct </span><a class="code" href="structfileSystem.html">fileSystem</a> *<a class="code" href="vfs_8c.html#c49aa10a62b250834a055476c849b7b3">vfsFindFS</a>(<span class="keywordtype">int</span> <a class="code" href="structfileSystem.html#a1b7987f710ba203dffb15590ff58ce0">vfsType</a>) {
<a name="l00060"></a>00060 <span class="keyword">struct </span><a class="code" href="structfileSystem.html">fileSystem</a> *tmp = 0x0;
<a name="l00061"></a>00061
<a name="l00062"></a>00062 <span class="comment">/* Search For File System */</span>
<a name="l00063"></a>00063 <span class="keywordflow">for</span> (tmp=<a class="code" href="vitals_8h.html#67aae71be472453526fc1a0bfbf80280">systemVitals</a>-><a class="code" href="structvitalsStruct.html#549507320bf8045f24ddf245e92777bd">fileSystems</a>;tmp;tmp=tmp-><a class="code" href="structfileSystem.html#a53ac2dce5c23d729ca2e49907a542de">next</a>) {
<a name="l00064"></a>00064 <span class="comment">/* If Found Return File System */</span>
<a name="l00065"></a>00065 <span class="keywordflow">if</span> (tmp-><a class="code" href="structfileSystem.html#a1b7987f710ba203dffb15590ff58ce0">vfsType</a> == vfsType) {
<a name="l00066"></a>00066 <span class="keywordflow">return</span>(tmp);
<a name="l00067"></a>00067 }
<a name="l00068"></a>00068 }
<a name="l00069"></a>00069
<a name="l00070"></a>00070 <span class="comment">/* If FS Not Found Return NULL */</span>
<a name="l00071"></a>00071 <span class="keywordflow">return</span>(0x0);
<a name="l00072"></a>00072 }
<a name="l00073"></a>00073
<a name="l00081"></a><a class="code" href="vfs_8c.html#d8cb9693ae7b6b9fc419efc975778338">00081</a> <span class="keywordtype">int</span> <a class="code" href="vfs_8h.html#8652b1ccbcf7d2a872c5781640f7d59a">vfsRegisterFS</a>(<span class="keyword">struct</span> <a class="code" href="structfileSystem.html">fileSystem</a> newFS) {
<a name="l00082"></a>00082 <span class="comment">/*</span>
<a name="l00083"></a>00083 <span class="comment">int vfsType,</span>
<a name="l00084"></a>00084 <span class="comment">void *vfsInitFS,</span>
<a name="l00085"></a>00085 <span class="comment">void *vfsRead,</span>
<a name="l00086"></a>00086 <span class="comment">void *vfsWrite,</span>
<a name="l00087"></a>00087 <span class="comment">void *vfsOpenFile,</span>
<a name="l00088"></a>00088 <span class="comment">void *vfsUnlink,</span>
<a name="l00089"></a>00089 <span class="comment">void *vfsMakeDir,</span>
<a name="l00090"></a>00090 <span class="comment">void *vfsRemDir,</span>
<a name="l00091"></a>00091 <span class="comment">void *vfsSync) {</span>
<a name="l00092"></a>00092 <span class="comment"> */</span>
<a name="l00093"></a>00093 <span class="keyword">struct </span><a class="code" href="structfileSystem.html">fileSystem</a> *tmpFs = 0x0;
<a name="l00094"></a>00094
<a name="l00095"></a>00095 <span class="keywordflow">if</span> (<a class="code" href="vfs_8c.html#c49aa10a62b250834a055476c849b7b3">vfsFindFS</a>(newFS.<a class="code" href="structfileSystem.html#a1b7987f710ba203dffb15590ff58ce0">vfsType</a>) != 0x0) {
<a name="l00096"></a>00096 <a class="code" href="kprint_8h.html#b2761bdf0cca73ad0fb5880895210cd8">kprintf</a>(<span class="stringliteral">"FS Is already Registered\n"</span>);
<a name="l00097"></a>00097 <span class="keywordflow">return</span>(0<a class="code" href="ap-boot_8S.html#1a3ac2137e21f6f0d400f1996914dd19">x1</a>);
<a name="l00098"></a>00098 }
<a name="l00099"></a>00099
<a name="l00100"></a>00100 <span class="comment">/* Allocate Memory */</span>
<a name="l00101"></a>00101 tmpFs = (<span class="keyword">struct </span><a class="code" href="structfileSystem.html">fileSystem</a> *)<a class="code" href="kmalloc_8h.html#150eab2ac4ce4553e21ca10e7f441762">kmalloc</a>(<span class="keyword">sizeof</span>(<span class="keyword">struct</span> <a class="code" href="structfileSystem.html">fileSystem</a>));
<a name="l00102"></a>00102 <span class="keywordflow">if</span> (tmpFs == <a class="code" href="types_8h.html#070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>) {
<a name="l00103"></a>00103 <a class="code" href="kprint_8h.html#b2761bdf0cca73ad0fb5880895210cd8">kprintf</a>(<span class="stringliteral">"vfsRegisterFS: memory allocation failed\n"</span>);
<a name="l00104"></a>00104 <span class="comment">/* Memory Allocation Failed */</span>
<a name="l00105"></a>00105 <span class="keywordflow">return</span>(0<a class="code" href="ap-boot_8S.html#1a3ac2137e21f6f0d400f1996914dd19">x1</a>);
<a name="l00106"></a>00106 }
<a name="l00107"></a>00107
<a name="l00108"></a>00108 <span class="comment">/* Set Up FS Defaults */</span>
<a name="l00109"></a>00109
<a name="l00110"></a>00110 <span class="comment">/* 2004 7-16-2004 mji </span>
<a name="l00111"></a>00111 <span class="comment"> * Old method:</span>
<a name="l00112"></a>00112 <span class="comment"> * tmpFs->vfsType = newFS.vfsType;</span>
<a name="l00113"></a>00113 <span class="comment"> * tmpFs->vfsInitFS = newFS.vfsInitFS;</span>
<a name="l00114"></a>00114 <span class="comment"> * tmpFs->vfsRead = newFS.vfsRead;</span>
<a name="l00115"></a>00115 <span class="comment"> * tmpFs->vfsWrite = newFS.vfsWrite;</span>
<a name="l00116"></a>00116 <span class="comment"> * tmpFs->vfsOpenFile = newFS.vfsOpenFile;</span>
<a name="l00117"></a>00117 <span class="comment"> * tmpFs->vfsUnlink = newFS.vfsUnlink;</span>
<a name="l00118"></a>00118 <span class="comment"> * tmpFs->vfsMakeDir = newFS.vfsMakeDir;</span>
<a name="l00119"></a>00119 <span class="comment"> * tmpFs->vfsRemDir = newFS.vfsRemDir;</span>
<a name="l00120"></a>00120 <span class="comment"> * tmpFs->vfsSync = newFS.vfsSync;</span>
<a name="l00121"></a>00121 <span class="comment"> */</span>
<a name="l00122"></a>00122 <span class="comment">/* new method: */</span>
<a name="l00123"></a>00123
<a name="l00124"></a>00124 <a class="code" href="lib_2string_8h.html#e33b18edb618c656b9b795b9fce2316c">memcpy</a>(tmpFs, &newFS, <span class="keyword">sizeof</span>(<span class="keyword">struct</span> fileSystem));
<a name="l00125"></a>00125 <span class="keywordflow">if</span> (!<a class="code" href="vitals_8h.html#67aae71be472453526fc1a0bfbf80280">systemVitals</a>-><a class="code" href="structvitalsStruct.html#549507320bf8045f24ddf245e92777bd">fileSystems</a>) {
<a name="l00126"></a>00126 tmpFs-><a class="code" href="structfileSystem.html#385cd52ba55b3ed318ee54f3f42b5a54">prev</a> = 0x0;
<a name="l00127"></a>00127 tmpFs-><a class="code" href="structfileSystem.html#a53ac2dce5c23d729ca2e49907a542de">next</a> = 0x0;
<a name="l00128"></a>00128 <a class="code" href="vitals_8h.html#67aae71be472453526fc1a0bfbf80280">systemVitals</a>-><a class="code" href="structvitalsStruct.html#549507320bf8045f24ddf245e92777bd">fileSystems</a> = tmpFs;
<a name="l00129"></a>00129 }
<a name="l00130"></a>00130 <span class="keywordflow">else</span> {
<a name="l00131"></a>00131 tmpFs-><a class="code" href="structfileSystem.html#385cd52ba55b3ed318ee54f3f42b5a54">prev</a> = 0x0;
<a name="l00132"></a>00132 tmpFs-><a class="code" href="structfileSystem.html#a53ac2dce5c23d729ca2e49907a542de">next</a> = <a class="code" href="vitals_8h.html#67aae71be472453526fc1a0bfbf80280">systemVitals</a>-><a class="code" href="structvitalsStruct.html#549507320bf8045f24ddf245e92777bd">fileSystems</a>;
<a name="l00133"></a>00133 <a class="code" href="vitals_8h.html#67aae71be472453526fc1a0bfbf80280">systemVitals</a>-><a class="code" href="structvitalsStruct.html#549507320bf8045f24ddf245e92777bd">fileSystems</a>-><a class="code" href="structfileSystem.html#385cd52ba55b3ed318ee54f3f42b5a54">prev</a> = tmpFs;
<a name="l00134"></a>00134 <a class="code" href="vitals_8h.html#67aae71be472453526fc1a0bfbf80280">systemVitals</a>-><a class="code" href="structvitalsStruct.html#549507320bf8045f24ddf245e92777bd">fileSystems</a> = tmpFs;
<a name="l00135"></a>00135 }
<a name="l00136"></a>00136
<a name="l00137"></a>00137 <span class="keywordflow">return</span>(0x0);
<a name="l00138"></a>00138 }
<a name="l00139"></a>00139
<a name="l00148"></a><a class="code" href="vfs_8c.html#3ca4e48103cbadae2952d277d03687be">00148</a> <span class="keywordtype">int</span> <a class="code" href="sysproto_8h.html#3ca4e48103cbadae2952d277d03687be">sys_open</a>(<span class="keyword">struct</span> <a class="code" href="structthread.html">thread</a> *td, <span class="keyword">struct</span> <a class="code" href="structopen__args.html">open_args</a> *uap) {
<a name="l00149"></a>00149 <span class="keywordtype">int</span> error = 0x0;
<a name="l00150"></a>00150 <span class="keywordtype">int</span> index = 0x0;
<a name="l00151"></a>00151 <span class="keyword">struct </span><a class="code" href="structfile.html">file</a> *nfp = 0x0;
<a name="l00152"></a>00152
<a name="l00153"></a>00153 error = <a class="code" href="kern__descrip_8h.html#434fb15226182b0ee879a5afe9a8c190">falloc</a>(td,&nfp,&index);
<a name="l00154"></a>00154
<a name="l00155"></a>00155 <span class="keywordflow">if</span> (error)
<a name="l00156"></a>00156 <span class="keywordflow">return</span>(error);
<a name="l00157"></a>00157
<a name="l00158"></a>00158 <a class="code" href="strcpy_8S.html#9132520cc79236b654666f4ddc1b516c">strcpy</a>(nfp-><a class="code" href="structfile.html#48952da96dfce82445b051d594d7bbf6">path</a>,uap-><a class="code" href="structopen__args.html#f0a9dc382e7d1862921cd1f25361b9bf">path</a>);
<a name="l00159"></a>00159
<a name="l00160"></a>00160 nfp-><a class="code" href="structfile.html#5a1b356e191a81d71a02560074aacd2a">fd</a> = <a class="code" href="file_8h.html#d6a41ac88a7d46d574e8a675fdde136c">fopen</a>(uap-><a class="code" href="structopen__args.html#f0a9dc382e7d1862921cd1f25361b9bf">path</a>,<span class="stringliteral">"r"</span>);
<a name="l00161"></a>00161 <span class="keywordflow">if</span> (nfp-><a class="code" href="structfile.html#5a1b356e191a81d71a02560074aacd2a">fd</a> == 0x0)
<a name="l00162"></a>00162 td-><a class="code" href="structthread.html#f3ec0788a84e5cb640a1646d1347998a">td_retval</a>[0] = -1;
<a name="l00163"></a>00163 <span class="keywordflow">else</span>
<a name="l00164"></a>00164 td-><a class="code" href="structthread.html#f3ec0788a84e5cb640a1646d1347998a">td_retval</a>[0] = index;
<a name="l00165"></a>00165 <span class="keywordflow">return</span> (error);
<a name="l00166"></a>00166 }
<a name="l00167"></a>00167
<a name="l00168"></a>00168
<a name="l00169"></a>00169 <span class="comment">/***</span>
<a name="l00170"></a>00170 <span class="comment"> END</span>
<a name="l00171"></a>00171 <span class="comment"> ***/</span>
<a name="l00172"></a>00172
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