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+<?xml version="1.0" encoding="UTF-8"?><!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
+<html xmlns="http://www.w3.org/1999/xhtml"><meta content="text/html; charset=UTF-8" http-equiv="Content-Type" /><!--This file has been created with freemind2html.xsl--><head><title>
+    
+      FastFat Driver 
+    
+    
+      a simplified tour
+    
+    
+      
+    
+    
+      DriverEntry()
+    
+    
+      Sets up callbacks for each of the Major IRP function codes; Each function code is given the same dispatcher, VfatBuildRequest().
+    
+    
+      
+    
+  </title><link rel="stylesheet" href="FastFat%20OverView.html_files/freemind2html.css" type="text/css" /><meta content="FreeMind-XSL Stylesheet (see: http://freemind-xsl.dev.slash-me.net/ for details)" name="generator" /><script type="text/javascript" src="FastFat%20OverView.html_files/freemind2html.js">  
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+					
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+          
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+                   else
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+                      img_el.src = 'FastFat%20OverView.html_files/hide.png';
+          
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+               };
+          
+          --></script></head><body><h1>
+    
+      FastFat Driver 
+    
+    
+      a simplified tour
+    
+    
+      
+    
+    
+      DriverEntry()
+    
+    
+      Sets up callbacks for each of the Major IRP function codes; Each function code is given the same dispatcher, VfatBuildRequest().
+    
+    
+      
+    
+  </h1><div style="width:96%;  padding:2%;  margin-bottom:10px;  border: 0px;  text-align:center;  vertical-align:center;"><img src="FastFat%20OverView.html_files/image.png" style="margin-bottom:10px; &#9;border: 0px; &#9;text-align:center; &#9;vertical-align:center;" alt="Imagemap" usemap="#fm_imagemap" /></div><map id="fm_imagemap" name="fm_imagemap"><area shape="rect" href="#FMID_739277139FM" alt="FastFat Driver 
+
+ a simplified tour 
+
+ 
+ ..." title="FastFat Driver 
+
+ a simplified tour 
+
+ 
+ ..." coords="0,147,673,369" /><area shape="rect" href="#FMID_837222004FM" alt="Ref: Installable File System Drivers" title="Ref: Installable File System Drivers" coords="693,0,912,20" /><area shape="rect" href="#FMID_699033480FM" alt="VfatBuildRequest() 
+
+ As the only IRP di ..." title="VfatBuildRequest() 
+
+ As the only IRP di ..." coords="693,200,1321,339" /><area shape="rect" href="#FMID_452655722FM" alt="Parameters of VfatBuildRequest() 
+
+ and  ..." title="Parameters of VfatBuildRequest() 
+
+ and  ..." coords="1341,28,1537,64" /><area shape="rect" href="#FMID_1350704534FM" alt="pointer to a DEVICE OBJECT" title="pointer to a DEVICE OBJECT" coords="1557,23,1743,43" /><area shape="rect" href="#FMID_1210519863FM" alt="pointer to an I/O request packet (IRP)" title="pointer to an I/O request packet (IRP)" coords="1557,48,1790,68" /><area shape="rect" href="#FMID_371897619FM" alt="Ref: Handling IRPs" title="Ref: Handling IRPs" coords="1810,46,1943,66" /><area shape="rect" href="#FMID_1089090939FM" alt="Uses IRP context(link discusses the same ..." title="Uses IRP context(link discusses the same ..." coords="1341,71,1741,91" /><area shape="rect" href="#FMID_1433880999FM" alt="Creates a FAT-specific IRP Context by pa ..." title="Creates a FAT-specific IRP Context by pa ..." coords="1341,121,1852,141" /><area shape="rect" href="#FMID_745022269FM" alt="VfatAllocateIrpContext() 
+
+ Allocates an ..." title="VfatAllocateIrpContext() 
+
+ Allocates an ..." coords="1872,111,2271,147" /><area shape="rect" href="#FMID_824613332FM" alt="Calls ExAllocateFromNPagedLookasideList( ..." title="Calls ExAllocateFromNPagedLookasideList( ..." coords="2291,96,2794,116" /><area shape="rect" href="#FMID_218295150FM" alt="Ref: Using Lookaside Lists" title="Ref: Using Lookaside Lists" coords="2814,94,2991,114" /><area shape="rect" href="#FMID_484298343FM" alt="Initializes members of the IRP context" title="Initializes members of the IRP context" coords="2291,119,2528,139" /><area shape="rect" href="#FMID_1647960170FM" alt="Returns a pointer to the IRP context it  ..." title="Returns a pointer to the IRP context it  ..." coords="2291,142,2712,162" /><area shape="rect" href="#FMID_316028212FM" alt="Passes the IRP context to VfatDispatchRe ..." title="Passes the IRP context to VfatDispatchRe ..." coords="1341,327,1897,347" /><area shape="rect" href="#FMID_1670207119FM" alt="VfatDispatchRequest() 
+
+ Processes the I ..." title="VfatDispatchRequest() 
+
+ Processes the I ..." coords="1917,317,2161,353" /><area shape="rect" href="#FMID_1965031639FM" alt="Ref: Writing Dispatch Routines" title="Ref: Writing Dispatch Routines" coords="2181,165,2377,185" /><area shape="rect" href="#FMID_1638216698FM" alt="Calls FsRtlEnterFileSystem() to disable  ..." title="Calls FsRtlEnterFileSystem() to disable  ..." coords="2181,188,2523,208" /><area shape="rect" href="#FMID_684755198FM" alt="Passes the IRP context to the appropriat ..." title="Passes the IRP context to the appropriat ..." coords="2181,291,2692,311" /><area shape="rect" href="#FMID_1454447487FM" alt="TODO: Complete docs for this node and be ..." title="TODO: Complete docs for this node and be ..." coords="2712,211,2986,231" /><area shape="rect" href="#FMID_95360256FM" alt="IRP_MJ_CREATE utilizes VfatCreate()" title="IRP_MJ_CREATE utilizes VfatCreate()" coords="2712,280,2934,300" /><area shape="rect" href="#FMID_412598684FM" alt="Opening the filesystem is pretty simple" title="Opening the filesystem is pretty simple" coords="2954,234,3178,254" /><area shape="rect" href="#FMID_755606753FM" alt="So is checking for IRPCONTEXT_CANWAIT an ..." title="So is checking for IRPCONTEXT_CANWAIT an ..." coords="2954,257,3519,277" /><area shape="rect" href="#FMID_348287713FM" alt="Calls ExAcquireResourceExclusiveLite()" title="Calls ExAcquireResourceExclusiveLite()" coords="2954,280,3185,300" /><area shape="rect" href="#FMID_167589571FM" alt="Calls VfatCreateFile()" title="Calls VfatCreateFile()" coords="2954,303,3083,323" /><area shape="rect" href="#FMID_1034544450FM" alt="Calls ExReleaseResourceLite()" title="Calls ExReleaseResourceLite()" coords="2954,326,3140,346" /><area shape="rect" href="#FMID_1958077126FM" alt="IRP_MJ_READ - VfatRead()" title="IRP_MJ_READ - VfatRead()" coords="2712,349,2874,369" /><area shape="rect" href="#FMID_1318684954FM" alt="IRP_MJ_WRITE - VfatWrite()" title="IRP_MJ_WRITE - VfatWrite()" coords="2712,372,2877,392" /><area shape="rect" href="#FMID_1232198276FM" alt="Calls IoCompleteRequest() if the IRP's f ..." title="Calls IoCompleteRequest() if the IRP's f ..." coords="2181,395,2580,415" /><area shape="rect" href="#FMID_964756434FM" alt="It either queues the IRP context with Vf ..." title="It either queues the IRP context with Vf ..." coords="2181,418,2537,438" /><area shape="rect" href="#FMID_1221722694FM" alt="...or frees the IRP context with VfatFre ..." title="...or frees the IRP context with VfatFre ..." coords="2181,441,2503,461" /><area shape="rect" href="#FMID_1492253843FM" alt="Calls FsRtlExitFileSystem() to re-enable ..." title="Calls FsRtlExitFileSystem() to re-enable ..." coords="2181,464,2581,484" /><area shape="rect" href="#FMID_376486655FM" alt="Returns status" title="Returns status" coords="2181,487,2294,507" /></map>
+
+<div class="node"><img src="FastFat%20OverView.html_files/hide.png" class="hideshow" alt="hide" onClick="toggle(&quot;N10007&quot;)" id="imgN10007" /><a id="FMID_739277139FM" /><div class="nodecontent">
+    <p style="text-align: center">
+      <font size="5"><b>FastFat Driver </b></font>
+    </p>
+    <p style="text-align: center">
+      <font size="3"><b>a simplified tour</b></font>
+    </p>
+    <p style="text-align: center">
+      
+    </p>
+    <p style="text-align: center">
+      <font size="4"><b>DriverEntry()</b></font>
+    </p>
+    <p>
+      Sets up callbacks for each of the Major IRP function codes; Each function code is given the same dispatcher, VfatBuildRequest().
+    </p>
+    <p>
+      
+    </p>
+  </div><div class="content" id="N10007"><div class="node"><img src="FastFat%20OverView.html_files/leaf.png" class="hideshow" alt="leaf" /><a id="FMID_837222004FM" /><div class="nodecontent"><a href="https://msdn.microsoft.com/en-us/library/windows/hardware/ff551834%28v=vs.85%29.aspx">Ref: Installable File System Drivers</a> <a href="https://msdn.microsoft.com/en-us/library/windows/hardware/ff551834%28v=vs.85%29.aspx"><img src="FastFat%20OverView.html_files/ilink.png" alt="User Link" style="border-width:0" /></a></div></div><div class="node"><img src="FastFat%20OverView.html_files/hide.png" class="hideshow" alt="hide" onClick="toggle(&quot;N10044&quot;)" id="imgN10044" /><a id="FMID_699033480FM" /><div class="nodecontent"><a href="http://doxygen.reactos.org/de/d72/drivers_2filesystems_2fastfat_2misc_8c_source.html#l00214">
+    <p style="text-align: center">
+      <font size="4"><b>VfatBuildRequest() </b></font>
+    </p>
+    <p>
+      As the only IRP dispatcher, VfatBuildRequest() is effectively called by the OS I/O Manager to complete each I/O operation.
+    </p>
+    <p>
+      
+    </p>
+    <p>
+      It takes the following parameters:
+    </p>
+    <ul>
+      <li>
+        pointer to a DEVICE_OBJECT
+      </li>
+      <li>
+        pointer to an I/O request packet (IRP)
+      </li>
+    </ul>
+  </a> <a href="http://doxygen.reactos.org/de/d72/drivers_2filesystems_2fastfat_2misc_8c_source.html#l00214"><img src="FastFat%20OverView.html_files/ilink.png" alt="User Link" style="border-width:0" /></a></div><div class="content" id="N10044"><div class="node"><img src="FastFat%20OverView.html_files/hide.png" class="hideshow" alt="hide" onClick="toggle(&quot;N10071&quot;)" id="imgN10071" /><a id="FMID_452655722FM" /><div class="nodecontent">
+    <p>
+      Parameters of VfatBuildRequest()
+    </p>
+    <p>
+      and of VfatAllocateIrpContext()
+    </p>
+  </div><div class="content" id="N10071"><div class="node"><img src="FastFat%20OverView.html_files/leaf.png" class="hideshow" alt="leaf" /><a id="FMID_1350704534FM" /><div class="nodecontent"><a href="https://msdn.microsoft.com/en-us/library/windows/hardware/ff543147%28v=vs.85%29.aspx">pointer to a DEVICE OBJECT</a> <a href="https://msdn.microsoft.com/en-us/library/windows/hardware/ff543147%28v=vs.85%29.aspx"><img src="FastFat%20OverView.html_files/ilink.png" alt="User Link" style="border-width:0" /></a></div></div><div class="node"><img src="FastFat%20OverView.html_files/hide.png" class="hideshow" alt="hide" onClick="toggle(&quot;N1008E&quot;)" id="imgN1008E" /><a id="FMID_1210519863FM" /><div class="nodecontent"><a href="https://msdn.microsoft.com/en-us/library/windows/hardware/ff550694%28v=vs.85%29.aspx">
+    <p>
+      pointer to an <b>I/O request packet (IRP)</b>
+    </p>
+  </a> <a href="https://msdn.microsoft.com/en-us/library/windows/hardware/ff550694%28v=vs.85%29.aspx"><img src="FastFat%20OverView.html_files/ilink.png" alt="User Link" style="border-width:0" /></a></div><div class="content" id="N1008E"><div class="node"><img src="FastFat%20OverView.html_files/leaf.png" class="hideshow" alt="leaf" /><a id="FMID_371897619FM" /><div class="nodecontent"><a href="https://msdn.microsoft.com/en-us/library/windows/hardware/ff546847%28v=vs.85%29.aspx#">Ref: Handling IRPs</a> <a href="https://msdn.microsoft.com/en-us/library/windows/hardware/ff546847%28v=vs.85%29.aspx#"><img src="FastFat%20OverView.html_files/ilink.png" alt="User Link" style="border-width:0" /></a></div></div></div></div></div></div><div class="node"><img src="FastFat%20OverView.html_files/leaf.png" class="hideshow" alt="leaf" /><a id="FMID_1089090939FM" /><div class="nodecontent"><a href="https://msdn.microsoft.com/en-us/library/windows/hardware/ff554754%28v=vs.85%29.aspx">
+    <p>
+      Uses <b>IRP context </b>(link discusses the same concept but for RDBSS)
+    </p>
+  </a> <a href="https://msdn.microsoft.com/en-us/library/windows/hardware/ff554754%28v=vs.85%29.aspx"><img src="FastFat%20OverView.html_files/ilink.png" alt="User Link" style="border-width:0" /></a></div></div><div class="node"><img src="FastFat%20OverView.html_files/hide.png" class="hideshow" alt="hide" onClick="toggle(&quot;N100C6&quot;)" id="imgN100C6" /><img src="FastFat%20OverView.html_files/icons/full-1.png" alt="full-1" /> <a id="FMID_1433880999FM" /><div class="nodecontent">
+    <p>
+      Creates a FAT-specific IRP Context by passing its parameters to VfatAllocateIrpContext()
+    </p>
+  </div><div class="content" id="N100C6"><div class="node"><img src="FastFat%20OverView.html_files/hide.png" class="hideshow" alt="hide" onClick="toggle(&quot;N100DC&quot;)" id="imgN100DC" /><a id="FMID_745022269FM" /><div class="nodecontent"><a href="http://doxygen.reactos.org/de/d72/drivers_2filesystems_2fastfat_2misc_8c_ae29e8fafb5f803400319a007160e6105.html">
+    <p style="text-align: center">
+      <b>VfatAllocateIrpContext() </b>
+    </p>
+    <p style="text-align: left">
+      Allocates and initializes a new, fat-specific IRP context and returns it.
+    </p>
+  </a> <a href="http://doxygen.reactos.org/de/d72/drivers_2filesystems_2fastfat_2misc_8c_ae29e8fafb5f803400319a007160e6105.html"><img src="FastFat%20OverView.html_files/ilink.png" alt="User Link" style="border-width:0" /></a></div><div class="content" id="N100DC"><div class="node"><img src="FastFat%20OverView.html_files/hide.png" class="hideshow" alt="hide" onClick="toggle(&quot;N100F8&quot;)" id="imgN100F8" /><img src="FastFat%20OverView.html_files/icons/full-1.png" alt="full-1" /> <a id="FMID_824613332FM" /><div class="nodecontent"><a href="https://msdn.microsoft.com/en-us/library/windows/hardware/ff544388%28v=vs.85%29.aspx">
+    <p>
+      Calls <b>ExAllocateFromNPagedLookasideList()</b> to reserve memory for the IRP context
+    </p>
+  </a> <a href="https://msdn.microsoft.com/en-us/library/windows/hardware/ff544388%28v=vs.85%29.aspx"><img src="FastFat%20OverView.html_files/ilink.png" alt="User Link" style="border-width:0" /></a></div><div class="content" id="N100F8"><div class="node"><img src="FastFat%20OverView.html_files/leaf.png" class="hideshow" alt="leaf" /><a id="FMID_218295150FM" /><div class="nodecontent"><a href="https://msdn.microsoft.com/en-us/library/windows/hardware/ff565416%28v=vs.85%29.aspx">Ref: Using Lookaside Lists</a> <a href="https://msdn.microsoft.com/en-us/library/windows/hardware/ff565416%28v=vs.85%29.aspx"><img src="FastFat%20OverView.html_files/ilink.png" alt="User Link" style="border-width:0" /></a></div></div></div></div><div class="node"><img src="FastFat%20OverView.html_files/leaf.png" class="hideshow" alt="leaf" /><img src="FastFat%20OverView.html_files/icons/full-2.png" alt="full-2" /> <a id="FMID_484298343FM" /><div class="nodecontent">Initializes members of the IRP context</div></div><div class="node"><img src="FastFat%20OverView.html_files/leaf.png" class="hideshow" alt="leaf" /><img src="FastFat%20OverView.html_files/icons/full-3.png" alt="full-3" /> <a id="FMID_1647960170FM" /><div class="nodecontent"><a href="http://doxygen.reactos.org/da/dfc/structVFAT__IRP__CONTEXT.html">
+    <p>
+      Returns a pointer to the IRP context it created, a <b>VFAT_IRP_CONTEXT</b>
+    </p>
+  </a> <a href="http://doxygen.reactos.org/da/dfc/structVFAT__IRP__CONTEXT.html"><img src="FastFat%20OverView.html_files/ilink.png" alt="User Link" style="border-width:0" /></a></div></div></div></div></div></div><div class="node"><img src="FastFat%20OverView.html_files/hide.png" class="hideshow" alt="hide" onClick="toggle(&quot;N10141&quot;)" id="imgN10141" /><img src="FastFat%20OverView.html_files/icons/full-2.png" alt="full-2" /> <a id="FMID_316028212FM" /><div class="nodecontent">Passes the IRP context to VfatDispatchRequest(), which handles the remainder of the operation.</div><div class="content" id="N10141"><div class="node"><img src="FastFat%20OverView.html_files/hide.png" class="hideshow" alt="hide" onClick="toggle(&quot;N1014A&quot;)" id="imgN1014A" /><a id="FMID_1670207119FM" /><div class="nodecontent"><a href="http://doxygen.reactos.org/de/d72/drivers_2filesystems_2fastfat_2misc_8c_a90fb5735736cba89a74a5c63de23f3f4.html#a90fb5735736cba89a74a5c63de23f3f4">
+    <p style="text-align: center">
+      <b>VfatDispatchRequest() </b>
+    </p>
+    <p style="text-align: left">
+      Processes the I/O request packet (IRP).
+    </p>
+  </a> <a href="http://doxygen.reactos.org/de/d72/drivers_2filesystems_2fastfat_2misc_8c_a90fb5735736cba89a74a5c63de23f3f4.html#a90fb5735736cba89a74a5c63de23f3f4"><img src="FastFat%20OverView.html_files/ilink.png" alt="User Link" style="border-width:0" /></a></div><div class="content" id="N1014A"><div class="node"><img src="FastFat%20OverView.html_files/leaf.png" class="hideshow" alt="leaf" /><a id="FMID_1965031639FM" /><div class="nodecontent"><a href="https://msdn.microsoft.com/en-us/library/windows/hardware/ff566407%28v=vs.85%29.aspx">Ref: Writing Dispatch Routines</a> <a href="https://msdn.microsoft.com/en-us/library/windows/hardware/ff566407%28v=vs.85%29.aspx"><img src="FastFat%20OverView.html_files/ilink.png" alt="User Link" style="border-width:0" /></a></div></div><div class="node"><img src="FastFat%20OverView.html_files/leaf.png" class="hideshow" alt="leaf" /><img src="FastFat%20OverView.html_files/icons/full-1.png" alt="full-1" /> <a id="FMID_1638216698FM" /><div class="nodecontent"><a href="https://msdn.microsoft.com/en-us/library/windows/hardware/ff545900%28v=vs.85%29.aspx">
+    <p>
+      Calls <b>FsRtlEnterFileSystem()</b> to disable normal APC's.
+    </p>
+  </a> <a href="https://msdn.microsoft.com/en-us/library/windows/hardware/ff545900%28v=vs.85%29.aspx"><img src="FastFat%20OverView.html_files/ilink.png" alt="User Link" style="border-width:0" /></a></div></div><div class="node"><img src="FastFat%20OverView.html_files/hide.png" class="hideshow" alt="hide" onClick="toggle(&quot;N10188&quot;)" id="imgN10188" /><img src="FastFat%20OverView.html_files/icons/full-2.png" alt="full-2" /> <a id="FMID_684755198FM" /><div class="nodecontent"><a href="https://msdn.microsoft.com/en-us/library/windows/hardware/ff550710%28v=vs.85%29.aspx">
+    <p>
+      Passes the IRP context to the appropriate handler, based on <b>IRP major function code</b>
+    </p>
+  </a> <a href="https://msdn.microsoft.com/en-us/library/windows/hardware/ff550710%28v=vs.85%29.aspx"><img src="FastFat%20OverView.html_files/ilink.png" alt="User Link" style="border-width:0" /></a></div><div class="content" id="N10188"><div class="node"><img src="FastFat%20OverView.html_files/leaf.png" class="hideshow" alt="leaf" /><a id="FMID_1454447487FM" /><div class="nodecontent">TODO: Complete docs for this node and beyond</div></div><div class="node"><img src="FastFat%20OverView.html_files/hide.png" class="hideshow" alt="hide" onClick="toggle(&quot;N101A8&quot;)" id="imgN101A8" /><a id="FMID_95360256FM" /><div class="nodecontent">
+    <p>
+      IRP_MJ_CREATE utilizes <b>VfatCreate()</b>
+    </p>
+  </div><div class="content" id="N101A8"><div class="node"><img src="FastFat%20OverView.html_files/leaf.png" class="hideshow" alt="leaf" /><a id="FMID_412598684FM" /><div class="nodecontent">Opening the filesystem is pretty simple</div></div><div class="node"><img src="FastFat%20OverView.html_files/leaf.png" class="hideshow" alt="leaf" /><a id="FMID_755606753FM" /><div class="nodecontent">So is checking for IRPCONTEXT_CANWAIT and returning the results of VfatMarkIrpContextForQueue()</div></div><div class="node"><img src="FastFat%20OverView.html_files/leaf.png" class="hideshow" alt="leaf" /><a id="FMID_348287713FM" /><div class="nodecontent">Calls ExAcquireResourceExclusiveLite()</div></div><div class="node"><img src="FastFat%20OverView.html_files/leaf.png" class="hideshow" alt="leaf" /><a id="FMID_167589571FM" /><div class="nodecontent">Calls VfatCreateFile()</div></div><div class="node"><img src="FastFat%20OverView.html_files/leaf.png" class="hideshow" alt="leaf" /><a id="FMID_1034544450FM" /><div class="nodecontent">Calls ExReleaseResourceLite()</div></div></div></div><div class="node"><img src="FastFat%20OverView.html_files/leaf.png" class="hideshow" alt="leaf" /><a id="FMID_1958077126FM" /><div class="nodecontent">IRP_MJ_READ - VfatRead()</div></div><div class="node"><img src="FastFat%20OverView.html_files/leaf.png" class="hideshow" alt="leaf" /><a id="FMID_1318684954FM" /><div class="nodecontent">IRP_MJ_WRITE - VfatWrite()</div></div></div></div><div class="node"><img src="FastFat%20OverView.html_files/leaf.png" class="hideshow" alt="leaf" /><img src="FastFat%20OverView.html_files/icons/full-3.png" alt="full-3" /> <a id="FMID_1232198276FM" /><div class="nodecontent"><a href="https://msdn.microsoft.com/en-us/library/windows/hardware/ff548343%28v=vs.85%29.aspx">
+    <p>
+      Calls <b>IoCompleteRequest()</b> if the IRP's flags indicate completion.
+    </p>
+  </a> <a href="https://msdn.microsoft.com/en-us/library/windows/hardware/ff548343%28v=vs.85%29.aspx"><img src="FastFat%20OverView.html_files/ilink.png" alt="User Link" style="border-width:0" /></a></div></div><div class="node"><img src="FastFat%20OverView.html_files/leaf.png" class="hideshow" alt="leaf" /><img src="FastFat%20OverView.html_files/icons/full-4.png" alt="full-4" /> <a id="FMID_964756434FM" /><div class="nodecontent"><a href="http://doxygen.reactos.org/de/d72/drivers_2filesystems_2fastfat_2misc_8c_ad4f74bdae40075c2356bac1307151c30.html#ad4f74bdae40075c2356bac1307151c30">
+    <p>
+      It either queues the IRP context with <b>VfatQueueRequest()</b>
+    </p>
+  </a> <a href="http://doxygen.reactos.org/de/d72/drivers_2filesystems_2fastfat_2misc_8c_ad4f74bdae40075c2356bac1307151c30.html#ad4f74bdae40075c2356bac1307151c30"><img src="FastFat%20OverView.html_files/ilink.png" alt="User Link" style="border-width:0" /></a></div></div><div class="node"><img src="FastFat%20OverView.html_files/leaf.png" class="hideshow" alt="leaf" /><img src="FastFat%20OverView.html_files/icons/full-4.png" alt="full-4" /> <a id="FMID_1221722694FM" /><div class="nodecontent"><a href="http://doxygen.reactos.org/de/d72/drivers_2filesystems_2fastfat_2misc_8c_a041a7f149573da3904d705ed0305b830.html#a041a7f149573da3904d705ed0305b830">
+    <p>
+      ...or frees the IRP context with <b>VfatFreeIrpContext()</b>
+    </p>
+  </a> <a href="http://doxygen.reactos.org/de/d72/drivers_2filesystems_2fastfat_2misc_8c_a041a7f149573da3904d705ed0305b830.html#a041a7f149573da3904d705ed0305b830"><img src="FastFat%20OverView.html_files/ilink.png" alt="User Link" style="border-width:0" /></a></div></div><div class="node"><img src="FastFat%20OverView.html_files/leaf.png" class="hideshow" alt="leaf" /><img src="FastFat%20OverView.html_files/icons/full-5.png" alt="full-5" /> <a id="FMID_1492253843FM" /><div class="nodecontent"><a href="https://msdn.microsoft.com/en-us/library/windows/hardware/ff545908%28v=vs.85%29.aspx">
+    <p>
+      Calls <b>FsRtlExitFileSystem()</b> to re-enable delivery of normal APC/s
+    </p>
+  </a> <a href="https://msdn.microsoft.com/en-us/library/windows/hardware/ff545908%28v=vs.85%29.aspx"><img src="FastFat%20OverView.html_files/ilink.png" alt="User Link" style="border-width:0" /></a></div></div><div class="node"><img src="FastFat%20OverView.html_files/leaf.png" class="hideshow" alt="leaf" /><img src="FastFat%20OverView.html_files/icons/full-6.png" alt="full-6" /> <a id="FMID_376486655FM" /><div class="nodecontent">Returns status</div></div></div></div></div></div></div></div></div></div>
+</body></html>
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+body { 
+  background-color: #FFFFFF;
+}
+
+div.node { 
+  padding-bottom:     1ex;
+  padding-left:       2em;
+}
+
+div.cloud { 
+  padding-bottom:     1ex;
+  padding-left:       2em;
+  background-color:   #C0C0FF;
+  border-width:       2px;
+  border-style:       solid;
+  border-color:       #A0A0FF;
+}
+
+div.content { 
+  border-width:       1px;
+  border-style:   dashed;
+  border-color:       #C0C0C0;
+}
+
+img.hideshow { 
+  padding-right: 1ex;
+}
+
+img.ilink { 
+  border-width: 0px;
+  padding-left: 1ex;
+}
+
+/* for notes and image export, fc, 18.7.2005. */
+.images {
+ max-width:50%;
+}
+
+.nodecontent {display:inline;}
+
+.note-and-attributes {
+ margin-left:10%;
+ color:#0000FF;
+}
+
+table.attributes {
+	border-collapse:collapse;
+	empty-cells:show;
+	border:thin black solid;
+}
+table.attributes td,th {
+	border:thin black solid;
+	padding-top:2px;
+	padding-bottom:2px;
+	padding-left:3px;
+	padding-right:3px;
+}
+table.attributes th {
+	text-align:center;
+}
+table.attributes caption {
+	margin-top:1em;
+	font-style:italic;
+	text-align:center;
+}
+/* Thanks to wolfgangradke, https://sourceforge.net/forum/message.php?msg_id=5991663 */
+div.nodecontent > p {
+	margin-top:0pt;
+	margin-bottom:0pt;
+	display:inline;
+}
+
+p + p { 
+ 	margin-top: 0.5em !important;
+	display:block !important;
+}
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Index: documentation/articles/FastFat Overview/FastFat OverView.mm
===================================================================
--- documentation/articles/FastFat Overview/FastFat OverView.mm	(nonexistent)
+++ documentation/articles/FastFat Overview/FastFat OverView.mm	(working copy)
@@ -0,0 +1,293 @@
+<map version="1.0.1">
+<!-- To view this file, download free mind mapping software FreeMind from http://freemind.sourceforge.net -->
+<node CREATED="1458047093486" ID="ID_739277139" MODIFIED="1458139156191">
+<richcontent TYPE="NODE"><html>
+  <head>
+    
+  </head>
+  <body>
+    <p style="text-align: center">
+      <font size="5"><b>FastFat Driver </b></font>
+    </p>
+    <p style="text-align: center">
+      <font size="3"><b>a simplified&#160;tour</b></font>
+    </p>
+    <p style="text-align: center">
+      
+    </p>
+    <p style="text-align: center">
+      <font size="4"><b>DriverEntry()</b></font>
+    </p>
+    <p>
+      Sets up callbacks for each of the Major IRP function codes; Each function code is given the same dispatcher, VfatBuildRequest().
+    </p>
+    <p>
+      
+    </p>
+  </body>
+</html>
+</richcontent>
+<node CREATED="1458139161067" ID="ID_837222004" LINK="https://msdn.microsoft.com/en-us/library/windows/hardware/ff551834%28v=vs.85%29.aspx" MODIFIED="1458139181094" POSITION="right" TEXT="Ref: Installable File System Drivers"/>
+<node CREATED="1458047227305" ID="ID_699033480" LINK="http://doxygen.reactos.org/de/d72/drivers_2filesystems_2fastfat_2misc_8c_source.html#l00214" MODIFIED="1458141425149" POSITION="right">
+<richcontent TYPE="NODE"><html>
+  <head>
+    
+  </head>
+  <body>
+    <p style="text-align: center">
+      <font size="4"><b>VfatBuildRequest() </b></font>
+    </p>
+    <p>
+      As the only IRP dispatcher, VfatBuildRequest() is effectively called by the OS I/O Manager to complete each I/O operation.
+    </p>
+    <p>
+      
+    </p>
+    <p>
+      It takes the following parameters:
+    </p>
+    <ul>
+      <li>
+        pointer to a DEVICE_OBJECT
+      </li>
+      <li>
+        pointer to an I/O request packet (IRP)
+      </li>
+    </ul>
+  </body>
+</html>
+</richcontent>
+<node CREATED="1458047406639" ID="ID_452655722" MODIFIED="1458050396978">
+<richcontent TYPE="NODE"><html>
+  <head>
+    
+  </head>
+  <body>
+    <p>
+      Parameters of VfatBuildRequest()
+    </p>
+    <p>
+      and of VfatAllocateIrpContext()
+    </p>
+  </body>
+</html>
+</richcontent>
+<node CREATED="1458049815196" ID="ID_1350704534" LINK="https://msdn.microsoft.com/en-us/library/windows/hardware/ff543147%28v=vs.85%29.aspx" MODIFIED="1458049877082" TEXT="pointer to a DEVICE OBJECT"/>
+<node CREATED="1458049884292" ID="ID_1210519863" LINK="https://msdn.microsoft.com/en-us/library/windows/hardware/ff550694%28v=vs.85%29.aspx" MODIFIED="1458135310385">
+<richcontent TYPE="NODE"><html>
+  <head>
+    
+  </head>
+  <body>
+    <p>
+      pointer to an <b>I/O request packet (IRP)</b>
+    </p>
+  </body>
+</html>
+</richcontent>
+<node CREATED="1458134938563" ID="ID_371897619" LINK="https://msdn.microsoft.com/en-us/library/windows/hardware/ff546847%28v=vs.85%29.aspx#" MODIFIED="1458134955949" TEXT="Ref: Handling IRPs"/>
+</node>
+</node>
+<node CREATED="1458050806238" ID="ID_1089090939" LINK="https://msdn.microsoft.com/en-us/library/windows/hardware/ff554754%28v=vs.85%29.aspx" MODIFIED="1458133942527">
+<richcontent TYPE="NODE"><html>
+  <head>
+    
+  </head>
+  <body>
+    <p>
+      Uses <b>IRP context </b>(link discusses the same concept but for RDBSS)
+    </p>
+  </body>
+</html>
+</richcontent>
+</node>
+<node CREATED="1458050202241" ID="ID_1433880999" MODIFIED="1458078587143">
+<richcontent TYPE="NODE"><html>
+  <head>
+    
+  </head>
+  <body>
+    <p>
+      Creates a FAT-specific IRP Context by passing its parameters to VfatAllocateIrpContext()
+    </p>
+  </body>
+</html>
+</richcontent>
+<icon BUILTIN="full-1"/>
+<node CREATED="1458050417845" ID="ID_745022269" LINK="http://doxygen.reactos.org/de/d72/drivers_2filesystems_2fastfat_2misc_8c_ae29e8fafb5f803400319a007160e6105.html" MODIFIED="1458078540465">
+<richcontent TYPE="NODE"><html>
+  <head>
+    
+  </head>
+  <body>
+    <p style="text-align: center">
+      <b>VfatAllocateIrpContext() </b>
+    </p>
+    <p style="text-align: left">
+      Allocates and initializes a new, fat-specific IRP context and returns it.
+    </p>
+  </body>
+</html></richcontent>
+<node CREATED="1458077115463" ID="ID_824613332" LINK="https://msdn.microsoft.com/en-us/library/windows/hardware/ff544388%28v=vs.85%29.aspx" MODIFIED="1458077284302">
+<richcontent TYPE="NODE"><html>
+  <head>
+    
+  </head>
+  <body>
+    <p>
+      Calls <b>ExAllocateFromNPagedLookasideList()</b>&#160;to reserve memory for the IRP context
+    </p>
+  </body>
+</html></richcontent>
+<icon BUILTIN="full-1"/>
+<node CREATED="1458130610008" ID="ID_218295150" LINK="https://msdn.microsoft.com/en-us/library/windows/hardware/ff565416%28v=vs.85%29.aspx" MODIFIED="1458130628134" TEXT="Ref: Using Lookaside Lists"/>
+</node>
+<node CREATED="1458077201431" ID="ID_484298343" MODIFIED="1458077332683" TEXT="Initializes members of the IRP context">
+<icon BUILTIN="full-2"/>
+</node>
+<node CREATED="1458077335801" ID="ID_1647960170" LINK="http://doxygen.reactos.org/da/dfc/structVFAT__IRP__CONTEXT.html" MODIFIED="1458078101782">
+<richcontent TYPE="NODE"><html>
+  <head>
+    
+  </head>
+  <body>
+    <p>
+      Returns a pointer to the IRP context it created, a <b>VFAT_IRP_CONTEXT</b>
+    </p>
+  </body>
+</html></richcontent>
+<icon BUILTIN="full-3"/>
+</node>
+</node>
+</node>
+<node CREATED="1458078684970" ID="ID_316028212" MODIFIED="1458078711398" TEXT="Passes the IRP context to VfatDispatchRequest(), which handles the remainder of the operation.">
+<icon BUILTIN="full-2"/>
+<node CREATED="1458078729442" ID="ID_1670207119" LINK="http://doxygen.reactos.org/de/d72/drivers_2filesystems_2fastfat_2misc_8c_a90fb5735736cba89a74a5c63de23f3f4.html#a90fb5735736cba89a74a5c63de23f3f4" MODIFIED="1458138959989">
+<richcontent TYPE="NODE"><html>
+  <head>
+    
+  </head>
+  <body>
+    <p style="text-align: center">
+      <b>VfatDispatchRequest() </b>
+    </p>
+    <p style="text-align: left">
+      Processes the I/O request packet (IRP).
+    </p>
+  </body>
+</html>
+</richcontent>
+<node CREATED="1458134863984" ID="ID_1965031639" LINK="https://msdn.microsoft.com/en-us/library/windows/hardware/ff566407%28v=vs.85%29.aspx" MODIFIED="1458134875549" TEXT="Ref: Writing Dispatch Routines"/>
+<node CREATED="1458135808373" ID="ID_1638216698" LINK="https://msdn.microsoft.com/en-us/library/windows/hardware/ff545900%28v=vs.85%29.aspx" MODIFIED="1458136120297">
+<richcontent TYPE="NODE"><html>
+  <head>
+    
+  </head>
+  <body>
+    <p>
+      Calls <b>FsRtlEnterFileSystem()</b>&#160;to disable normal APC's.
+    </p>
+  </body>
+</html>
+</richcontent>
+<icon BUILTIN="full-1"/>
+</node>
+<node CREATED="1458134529754" ID="ID_684755198" LINK="https://msdn.microsoft.com/en-us/library/windows/hardware/ff550710%28v=vs.85%29.aspx" MODIFIED="1458136127297">
+<richcontent TYPE="NODE"><html>
+  <head>
+    
+  </head>
+  <body>
+    <p>
+      Passes the IRP context to the appropriate handler, based on <b>IRP major function code</b>
+    </p>
+  </body>
+</html>
+</richcontent>
+<icon BUILTIN="full-2"/>
+<node CREATED="1458238450437" ID="ID_1454447487" MODIFIED="1458238483377" TEXT="TODO: Complete docs for this node and beyond"/>
+<node CREATED="1458136380246" ID="ID_95360256" MODIFIED="1458141616646">
+<richcontent TYPE="NODE"><html>
+  <head>
+    
+  </head>
+  <body>
+    <p>
+      IRP_MJ_CREATE utilizes <b>VfatCreate()</b>
+    </p>
+  </body>
+</html>
+</richcontent>
+<node CREATED="1458141618432" ID="ID_412598684" MODIFIED="1458141758052" TEXT="Opening the filesystem is pretty simple"/>
+<node CREATED="1458141774488" ID="ID_755606753" MODIFIED="1458141859956" TEXT="So is checking for IRPCONTEXT_CANWAIT and returning the results of VfatMarkIrpContextForQueue()"/>
+<node CREATED="1458141863424" ID="ID_348287713" MODIFIED="1458141933844" TEXT="Calls ExAcquireResourceExclusiveLite()"/>
+<node CREATED="1458141934680" ID="ID_167589571" MODIFIED="1458141945037" TEXT="Calls VfatCreateFile()"/>
+<node CREATED="1458141953537" ID="ID_1034544450" MODIFIED="1458141957756" TEXT="Calls ExReleaseResourceLite()"/>
+</node>
+<node CREATED="1458141578824" ID="ID_1958077126" MODIFIED="1458141591620" TEXT="IRP_MJ_READ - VfatRead()"/>
+<node CREATED="1458141592920" ID="ID_1318684954" MODIFIED="1458141611317" TEXT="IRP_MJ_WRITE - VfatWrite()"/>
+</node>
+<node CREATED="1458136135461" ID="ID_1232198276" LINK="https://msdn.microsoft.com/en-us/library/windows/hardware/ff548343%28v=vs.85%29.aspx" MODIFIED="1458136468556">
+<richcontent TYPE="NODE"><html>
+  <head>
+    
+  </head>
+  <body>
+    <p>
+      Calls <b>IoCompleteRequest()</b>&#160;if the IRP's flags indicate completion.
+    </p>
+  </body>
+</html>
+</richcontent>
+<icon BUILTIN="full-3"/>
+</node>
+<node CREATED="1458136531467" ID="ID_964756434" LINK="http://doxygen.reactos.org/de/d72/drivers_2filesystems_2fastfat_2misc_8c_ad4f74bdae40075c2356bac1307151c30.html#ad4f74bdae40075c2356bac1307151c30" MODIFIED="1458139056841">
+<richcontent TYPE="NODE"><html>
+  <head>
+    
+  </head>
+  <body>
+    <p>
+      It either queues the IRP context with <b>VfatQueueRequest()</b>
+    </p>
+  </body>
+</html>
+</richcontent>
+<icon BUILTIN="full-4"/>
+</node>
+<node CREATED="1458136611975" ID="ID_1221722694" LINK="http://doxygen.reactos.org/de/d72/drivers_2filesystems_2fastfat_2misc_8c_a041a7f149573da3904d705ed0305b830.html#a041a7f149573da3904d705ed0305b830" MODIFIED="1458139076574">
+<richcontent TYPE="NODE"><html>
+  <head>
+    
+  </head>
+  <body>
+    <p>
+      ...or frees the IRP context with <b>VfatFreeIrpContext()</b>
+    </p>
+  </body>
+</html>
+</richcontent>
+<icon BUILTIN="full-4"/>
+</node>
+<node CREATED="1458136928959" ID="ID_1492253843" LINK="https://msdn.microsoft.com/en-us/library/windows/hardware/ff545908%28v=vs.85%29.aspx" MODIFIED="1458137001150">
+<richcontent TYPE="NODE"><html>
+  <head>
+    
+  </head>
+  <body>
+    <p>
+      Calls <b>FsRtlExitFileSystem()</b>&#160;to re-enable delivery of normal APC/s
+    </p>
+  </body>
+</html>
+</richcontent>
+<icon BUILTIN="full-5"/>
+</node>
+<node CREATED="1458137014399" ID="ID_376486655" MODIFIED="1458137027779" TEXT="Returns status">
+<icon BUILTIN="full-6"/>
+</node>
+</node>
+</node>
+</node>
+</node>
+</map>
Index: documentation/articles/FastFat Overview/ReadMe.html
===================================================================
--- documentation/articles/FastFat Overview/ReadMe.html	(nonexistent)
+++ documentation/articles/FastFat Overview/ReadMe.html	(working copy)
@@ -0,0 +1,19 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+	<meta charset="utf-8">
+	<title>ReadMe</title>
+</head>
+
+<body>
+	<div style="width: 900px; margin: auto">
+	<p>This is a graphical, hierarchical walkthrough of ReactOS' FastFat driver. It's intended to supplement the FastFat source to quickly familiarize developers with Windows filesystem driver development.</p>
+	<p>
+It was created with FreeMind, which you can get <a href="http://freemind.sourceforge.net/wiki/index.php/Download">here</a>. An XHTML export is included, but the file is more useful in FreeMind because the links work better.</p>
+	<p>
+It contains many links to MSDN references, as well as ReactOS source. These links and this document itself will likely become outdated over time. If you notice any dead links, please do your part to keep it up-to-date :)
+	</p>
+	</div>
+
+</body>
+</html>
\ No newline at end of file
Index: documentation/articles/FastFat Overview/FastFat OverView.html
===================================================================
--- documentation/articles/FastFat Overview/FastFat OverView.html	(nonexistent)
+++ documentation/articles/FastFat Overview/FastFat OverView.html	(working copy)
@@ -0,0 +1,202 @@
+<?xml version="1.0" encoding="UTF-8"?><!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
+<html xmlns="http://www.w3.org/1999/xhtml"><meta content="text/html; charset=UTF-8" http-equiv="Content-Type" /><!--This file has been created with freemind2html.xsl--><head><title>
+    
+      FastFat Driver 
+    
+    
+      a simplified tour
+    
+    
+      
+    
+    
+      DriverEntry()
+    
+    
+      Sets up callbacks for each of the Major IRP function codes; Each function code is given the same dispatcher, VfatBuildRequest().
+    
+    
+      
+    
+  </title><link rel="stylesheet" href="FastFat%20OverView.html_files/freemind2html.css" type="text/css" /><meta content="FreeMind-XSL Stylesheet (see: http://freemind-xsl.dev.slash-me.net/ for details)" name="generator" /><script type="text/javascript" src="FastFat%20OverView.html_files/freemind2html.js">  
+	</script><script type="text/javascript"><!--
+          
+               function toggle(id)
+               {
+                   div_el = document.getElementById(id);
+                   img_el = document.getElementById('img'+id);
+                   if (div_el.style.display != 'none')
+                   {
+          
+					
+                      div_el.style.display='none';
+                      img_el.src = 'FastFat%20OverView.html_files/show.png';
+          
+                   }
+                   else
+                   {
+          
+                      div_el.style.display='block';
+                      img_el.src = 'FastFat%20OverView.html_files/hide.png';
+          
+                   };
+               };
+          
+          --></script></head><body><h1>
+    
+      FastFat Driver 
+    
+    
+      a simplified tour
+    
+    
+      
+    
+    
+      DriverEntry()
+    
+    
+      Sets up callbacks for each of the Major IRP function codes; Each function code is given the same dispatcher, VfatBuildRequest().
+    
+    
+      
+    
+  </h1><div style="width:96%;  padding:2%;  margin-bottom:10px;  border: 0px;  text-align:center;  vertical-align:center;"><img src="FastFat%20OverView.html_files/image.png" style="margin-bottom:10px; &#9;border: 0px; &#9;text-align:center; &#9;vertical-align:center;" alt="Imagemap" usemap="#fm_imagemap" /></div><map id="fm_imagemap" name="fm_imagemap"><area shape="rect" href="#FMID_739277139FM" alt="FastFat Driver 
+
+ a simplified tour 
+
+ 
+ ..." title="FastFat Driver 
+
+ a simplified tour 
+
+ 
+ ..." coords="0,147,673,369" /><area shape="rect" href="#FMID_837222004FM" alt="Ref: Installable File System Drivers" title="Ref: Installable File System Drivers" coords="693,0,912,20" /><area shape="rect" href="#FMID_699033480FM" alt="VfatBuildRequest() 
+
+ As the only IRP di ..." title="VfatBuildRequest() 
+
+ As the only IRP di ..." coords="693,200,1321,339" /><area shape="rect" href="#FMID_452655722FM" alt="Parameters of VfatBuildRequest() 
+
+ and  ..." title="Parameters of VfatBuildRequest() 
+
+ and  ..." coords="1341,28,1537,64" /><area shape="rect" href="#FMID_1350704534FM" alt="pointer to a DEVICE OBJECT" title="pointer to a DEVICE OBJECT" coords="1557,23,1743,43" /><area shape="rect" href="#FMID_1210519863FM" alt="pointer to an I/O request packet (IRP)" title="pointer to an I/O request packet (IRP)" coords="1557,48,1790,68" /><area shape="rect" href="#FMID_371897619FM" alt="Ref: Handling IRPs" title="Ref: Handling IRPs" coords="1810,46,1943,66" /><area shape="rect" href="#FMID_1089090939FM" alt="Uses IRP context(link discusses the same ..." title="Uses IRP context(link discusses the same ..." coords="1341,71,1741,91" /><area shape="rect" href="#FMID_1433880999FM" alt="Creates a FAT-specific IRP Context by pa ..." title="Creates a FAT-specific IRP Context by pa ..." coords="1341,121,1852,141" /><area shape="rect" href="#FMID_745022269FM" alt="VfatAllocateIrpContext() 
+
+ Allocates an ..." title="VfatAllocateIrpContext() 
+
+ Allocates an ..." coords="1872,111,2271,147" /><area shape="rect" href="#FMID_824613332FM" alt="Calls ExAllocateFromNPagedLookasideList( ..." title="Calls ExAllocateFromNPagedLookasideList( ..." coords="2291,96,2794,116" /><area shape="rect" href="#FMID_218295150FM" alt="Ref: Using Lookaside Lists" title="Ref: Using Lookaside Lists" coords="2814,94,2991,114" /><area shape="rect" href="#FMID_484298343FM" alt="Initializes members of the IRP context" title="Initializes members of the IRP context" coords="2291,119,2528,139" /><area shape="rect" href="#FMID_1647960170FM" alt="Returns a pointer to the IRP context it  ..." title="Returns a pointer to the IRP context it  ..." coords="2291,142,2712,162" /><area shape="rect" href="#FMID_316028212FM" alt="Passes the IRP context to VfatDispatchRe ..." title="Passes the IRP context to VfatDispatchRe ..." coords="1341,327,1897,347" /><area shape="rect" href="#FMID_1670207119FM" alt="VfatDispatchRequest() 
+
+ Processes the I ..." title="VfatDispatchRequest() 
+
+ Processes the I ..." coords="1917,317,2161,353" /><area shape="rect" href="#FMID_1965031639FM" alt="Ref: Writing Dispatch Routines" title="Ref: Writing Dispatch Routines" coords="2181,165,2377,185" /><area shape="rect" href="#FMID_1638216698FM" alt="Calls FsRtlEnterFileSystem() to disable  ..." title="Calls FsRtlEnterFileSystem() to disable  ..." coords="2181,188,2523,208" /><area shape="rect" href="#FMID_684755198FM" alt="Passes the IRP context to the appropriat ..." title="Passes the IRP context to the appropriat ..." coords="2181,291,2692,311" /><area shape="rect" href="#FMID_1454447487FM" alt="TODO: Complete docs for this node and be ..." title="TODO: Complete docs for this node and be ..." coords="2712,211,2986,231" /><area shape="rect" href="#FMID_95360256FM" alt="IRP_MJ_CREATE utilizes VfatCreate()" title="IRP_MJ_CREATE utilizes VfatCreate()" coords="2712,280,2934,300" /><area shape="rect" href="#FMID_412598684FM" alt="Opening the filesystem is pretty simple" title="Opening the filesystem is pretty simple" coords="2954,234,3178,254" /><area shape="rect" href="#FMID_755606753FM" alt="So is checking for IRPCONTEXT_CANWAIT an ..." title="So is checking for IRPCONTEXT_CANWAIT an ..." coords="2954,257,3519,277" /><area shape="rect" href="#FMID_348287713FM" alt="Calls ExAcquireResourceExclusiveLite()" title="Calls ExAcquireResourceExclusiveLite()" coords="2954,280,3185,300" /><area shape="rect" href="#FMID_167589571FM" alt="Calls VfatCreateFile()" title="Calls VfatCreateFile()" coords="2954,303,3083,323" /><area shape="rect" href="#FMID_1034544450FM" alt="Calls ExReleaseResourceLite()" title="Calls ExReleaseResourceLite()" coords="2954,326,3140,346" /><area shape="rect" href="#FMID_1958077126FM" alt="IRP_MJ_READ - VfatRead()" title="IRP_MJ_READ - VfatRead()" coords="2712,349,2874,369" /><area shape="rect" href="#FMID_1318684954FM" alt="IRP_MJ_WRITE - VfatWrite()" title="IRP_MJ_WRITE - VfatWrite()" coords="2712,372,2877,392" /><area shape="rect" href="#FMID_1232198276FM" alt="Calls IoCompleteRequest() if the IRP's f ..." title="Calls IoCompleteRequest() if the IRP's f ..." coords="2181,395,2580,415" /><area shape="rect" href="#FMID_964756434FM" alt="It either queues the IRP context with Vf ..." title="It either queues the IRP context with Vf ..." coords="2181,418,2537,438" /><area shape="rect" href="#FMID_1221722694FM" alt="...or frees the IRP context with VfatFre ..." title="...or frees the IRP context with VfatFre ..." coords="2181,441,2503,461" /><area shape="rect" href="#FMID_1492253843FM" alt="Calls FsRtlExitFileSystem() to re-enable ..." title="Calls FsRtlExitFileSystem() to re-enable ..." coords="2181,464,2581,484" /><area shape="rect" href="#FMID_376486655FM" alt="Returns status" title="Returns status" coords="2181,487,2294,507" /></map>
+
+<div class="node"><img src="FastFat%20OverView.html_files/hide.png" class="hideshow" alt="hide" onClick="toggle(&quot;N10007&quot;)" id="imgN10007" /><a id="FMID_739277139FM" /><div class="nodecontent">
+    <p style="text-align: center">
+      <font size="5"><b>FastFat Driver </b></font>
+    </p>
+    <p style="text-align: center">
+      <font size="3"><b>a simplified tour</b></font>
+    </p>
+    <p style="text-align: center">
+      
+    </p>
+    <p style="text-align: center">
+      <font size="4"><b>DriverEntry()</b></font>
+    </p>
+    <p>
+      Sets up callbacks for each of the Major IRP function codes; Each function code is given the same dispatcher, VfatBuildRequest().
+    </p>
+    <p>
+      
+    </p>
+  </div><div class="content" id="N10007"><div class="node"><img src="FastFat%20OverView.html_files/leaf.png" class="hideshow" alt="leaf" /><a id="FMID_837222004FM" /><div class="nodecontent"><a href="https://msdn.microsoft.com/en-us/library/windows/hardware/ff551834%28v=vs.85%29.aspx">Ref: Installable File System Drivers</a> <a href="https://msdn.microsoft.com/en-us/library/windows/hardware/ff551834%28v=vs.85%29.aspx"><img src="FastFat%20OverView.html_files/ilink.png" alt="User Link" style="border-width:0" /></a></div></div><div class="node"><img src="FastFat%20OverView.html_files/hide.png" class="hideshow" alt="hide" onClick="toggle(&quot;N10044&quot;)" id="imgN10044" /><a id="FMID_699033480FM" /><div class="nodecontent"><a href="http://doxygen.reactos.org/de/d72/drivers_2filesystems_2fastfat_2misc_8c_source.html#l00214">
+    <p style="text-align: center">
+      <font size="4"><b>VfatBuildRequest() </b></font>
+    </p>
+    <p>
+      As the only IRP dispatcher, VfatBuildRequest() is effectively called by the OS I/O Manager to complete each I/O operation.
+    </p>
+    <p>
+      
+    </p>
+    <p>
+      It takes the following parameters:
+    </p>
+    <ul>
+      <li>
+        pointer to a DEVICE_OBJECT
+      </li>
+      <li>
+        pointer to an I/O request packet (IRP)
+      </li>
+    </ul>
+  </a> <a href="http://doxygen.reactos.org/de/d72/drivers_2filesystems_2fastfat_2misc_8c_source.html#l00214"><img src="FastFat%20OverView.html_files/ilink.png" alt="User Link" style="border-width:0" /></a></div><div class="content" id="N10044"><div class="node"><img src="FastFat%20OverView.html_files/hide.png" class="hideshow" alt="hide" onClick="toggle(&quot;N10071&quot;)" id="imgN10071" /><a id="FMID_452655722FM" /><div class="nodecontent">
+    <p>
+      Parameters of VfatBuildRequest()
+    </p>
+    <p>
+      and of VfatAllocateIrpContext()
+    </p>
+  </div><div class="content" id="N10071"><div class="node"><img src="FastFat%20OverView.html_files/leaf.png" class="hideshow" alt="leaf" /><a id="FMID_1350704534FM" /><div class="nodecontent"><a href="https://msdn.microsoft.com/en-us/library/windows/hardware/ff543147%28v=vs.85%29.aspx">pointer to a DEVICE OBJECT</a> <a href="https://msdn.microsoft.com/en-us/library/windows/hardware/ff543147%28v=vs.85%29.aspx"><img src="FastFat%20OverView.html_files/ilink.png" alt="User Link" style="border-width:0" /></a></div></div><div class="node"><img src="FastFat%20OverView.html_files/hide.png" class="hideshow" alt="hide" onClick="toggle(&quot;N1008E&quot;)" id="imgN1008E" /><a id="FMID_1210519863FM" /><div class="nodecontent"><a href="https://msdn.microsoft.com/en-us/library/windows/hardware/ff550694%28v=vs.85%29.aspx">
+    <p>
+      pointer to an <b>I/O request packet (IRP)</b>
+    </p>
+  </a> <a href="https://msdn.microsoft.com/en-us/library/windows/hardware/ff550694%28v=vs.85%29.aspx"><img src="FastFat%20OverView.html_files/ilink.png" alt="User Link" style="border-width:0" /></a></div><div class="content" id="N1008E"><div class="node"><img src="FastFat%20OverView.html_files/leaf.png" class="hideshow" alt="leaf" /><a id="FMID_371897619FM" /><div class="nodecontent"><a href="https://msdn.microsoft.com/en-us/library/windows/hardware/ff546847%28v=vs.85%29.aspx#">Ref: Handling IRPs</a> <a href="https://msdn.microsoft.com/en-us/library/windows/hardware/ff546847%28v=vs.85%29.aspx#"><img src="FastFat%20OverView.html_files/ilink.png" alt="User Link" style="border-width:0" /></a></div></div></div></div></div></div><div class="node"><img src="FastFat%20OverView.html_files/leaf.png" class="hideshow" alt="leaf" /><a id="FMID_1089090939FM" /><div class="nodecontent"><a href="https://msdn.microsoft.com/en-us/library/windows/hardware/ff554754%28v=vs.85%29.aspx">
+    <p>
+      Uses <b>IRP context </b>(link discusses the same concept but for RDBSS)
+    </p>
+  </a> <a href="https://msdn.microsoft.com/en-us/library/windows/hardware/ff554754%28v=vs.85%29.aspx"><img src="FastFat%20OverView.html_files/ilink.png" alt="User Link" style="border-width:0" /></a></div></div><div class="node"><img src="FastFat%20OverView.html_files/hide.png" class="hideshow" alt="hide" onClick="toggle(&quot;N100C6&quot;)" id="imgN100C6" /><img src="FastFat%20OverView.html_files/icons/full-1.png" alt="full-1" /> <a id="FMID_1433880999FM" /><div class="nodecontent">
+    <p>
+      Creates a FAT-specific IRP Context by passing its parameters to VfatAllocateIrpContext()
+    </p>
+  </div><div class="content" id="N100C6"><div class="node"><img src="FastFat%20OverView.html_files/hide.png" class="hideshow" alt="hide" onClick="toggle(&quot;N100DC&quot;)" id="imgN100DC" /><a id="FMID_745022269FM" /><div class="nodecontent"><a href="http://doxygen.reactos.org/de/d72/drivers_2filesystems_2fastfat_2misc_8c_ae29e8fafb5f803400319a007160e6105.html">
+    <p style="text-align: center">
+      <b>VfatAllocateIrpContext() </b>
+    </p>
+    <p style="text-align: left">
+      Allocates and initializes a new, fat-specific IRP context and returns it.
+    </p>
+  </a> <a href="http://doxygen.reactos.org/de/d72/drivers_2filesystems_2fastfat_2misc_8c_ae29e8fafb5f803400319a007160e6105.html"><img src="FastFat%20OverView.html_files/ilink.png" alt="User Link" style="border-width:0" /></a></div><div class="content" id="N100DC"><div class="node"><img src="FastFat%20OverView.html_files/hide.png" class="hideshow" alt="hide" onClick="toggle(&quot;N100F8&quot;)" id="imgN100F8" /><img src="FastFat%20OverView.html_files/icons/full-1.png" alt="full-1" /> <a id="FMID_824613332FM" /><div class="nodecontent"><a href="https://msdn.microsoft.com/en-us/library/windows/hardware/ff544388%28v=vs.85%29.aspx">
+    <p>
+      Calls <b>ExAllocateFromNPagedLookasideList()</b> to reserve memory for the IRP context
+    </p>
+  </a> <a href="https://msdn.microsoft.com/en-us/library/windows/hardware/ff544388%28v=vs.85%29.aspx"><img src="FastFat%20OverView.html_files/ilink.png" alt="User Link" style="border-width:0" /></a></div><div class="content" id="N100F8"><div class="node"><img src="FastFat%20OverView.html_files/leaf.png" class="hideshow" alt="leaf" /><a id="FMID_218295150FM" /><div class="nodecontent"><a href="https://msdn.microsoft.com/en-us/library/windows/hardware/ff565416%28v=vs.85%29.aspx">Ref: Using Lookaside Lists</a> <a href="https://msdn.microsoft.com/en-us/library/windows/hardware/ff565416%28v=vs.85%29.aspx"><img src="FastFat%20OverView.html_files/ilink.png" alt="User Link" style="border-width:0" /></a></div></div></div></div><div class="node"><img src="FastFat%20OverView.html_files/leaf.png" class="hideshow" alt="leaf" /><img src="FastFat%20OverView.html_files/icons/full-2.png" alt="full-2" /> <a id="FMID_484298343FM" /><div class="nodecontent">Initializes members of the IRP context</div></div><div class="node"><img src="FastFat%20OverView.html_files/leaf.png" class="hideshow" alt="leaf" /><img src="FastFat%20OverView.html_files/icons/full-3.png" alt="full-3" /> <a id="FMID_1647960170FM" /><div class="nodecontent"><a href="http://doxygen.reactos.org/da/dfc/structVFAT__IRP__CONTEXT.html">
+    <p>
+      Returns a pointer to the IRP context it created, a <b>VFAT_IRP_CONTEXT</b>
+    </p>
+  </a> <a href="http://doxygen.reactos.org/da/dfc/structVFAT__IRP__CONTEXT.html"><img src="FastFat%20OverView.html_files/ilink.png" alt="User Link" style="border-width:0" /></a></div></div></div></div></div></div><div class="node"><img src="FastFat%20OverView.html_files/hide.png" class="hideshow" alt="hide" onClick="toggle(&quot;N10141&quot;)" id="imgN10141" /><img src="FastFat%20OverView.html_files/icons/full-2.png" alt="full-2" /> <a id="FMID_316028212FM" /><div class="nodecontent">Passes the IRP context to VfatDispatchRequest(), which handles the remainder of the operation.</div><div class="content" id="N10141"><div class="node"><img src="FastFat%20OverView.html_files/hide.png" class="hideshow" alt="hide" onClick="toggle(&quot;N1014A&quot;)" id="imgN1014A" /><a id="FMID_1670207119FM" /><div class="nodecontent"><a href="http://doxygen.reactos.org/de/d72/drivers_2filesystems_2fastfat_2misc_8c_a90fb5735736cba89a74a5c63de23f3f4.html#a90fb5735736cba89a74a5c63de23f3f4">
+    <p style="text-align: center">
+      <b>VfatDispatchRequest() </b>
+    </p>
+    <p style="text-align: left">
+      Processes the I/O request packet (IRP).
+    </p>
+  </a> <a href="http://doxygen.reactos.org/de/d72/drivers_2filesystems_2fastfat_2misc_8c_a90fb5735736cba89a74a5c63de23f3f4.html#a90fb5735736cba89a74a5c63de23f3f4"><img src="FastFat%20OverView.html_files/ilink.png" alt="User Link" style="border-width:0" /></a></div><div class="content" id="N1014A"><div class="node"><img src="FastFat%20OverView.html_files/leaf.png" class="hideshow" alt="leaf" /><a id="FMID_1965031639FM" /><div class="nodecontent"><a href="https://msdn.microsoft.com/en-us/library/windows/hardware/ff566407%28v=vs.85%29.aspx">Ref: Writing Dispatch Routines</a> <a href="https://msdn.microsoft.com/en-us/library/windows/hardware/ff566407%28v=vs.85%29.aspx"><img src="FastFat%20OverView.html_files/ilink.png" alt="User Link" style="border-width:0" /></a></div></div><div class="node"><img src="FastFat%20OverView.html_files/leaf.png" class="hideshow" alt="leaf" /><img src="FastFat%20OverView.html_files/icons/full-1.png" alt="full-1" /> <a id="FMID_1638216698FM" /><div class="nodecontent"><a href="https://msdn.microsoft.com/en-us/library/windows/hardware/ff545900%28v=vs.85%29.aspx">
+    <p>
+      Calls <b>FsRtlEnterFileSystem()</b> to disable normal APC's.
+    </p>
+  </a> <a href="https://msdn.microsoft.com/en-us/library/windows/hardware/ff545900%28v=vs.85%29.aspx"><img src="FastFat%20OverView.html_files/ilink.png" alt="User Link" style="border-width:0" /></a></div></div><div class="node"><img src="FastFat%20OverView.html_files/hide.png" class="hideshow" alt="hide" onClick="toggle(&quot;N10188&quot;)" id="imgN10188" /><img src="FastFat%20OverView.html_files/icons/full-2.png" alt="full-2" /> <a id="FMID_684755198FM" /><div class="nodecontent"><a href="https://msdn.microsoft.com/en-us/library/windows/hardware/ff550710%28v=vs.85%29.aspx">
+    <p>
+      Passes the IRP context to the appropriate handler, based on <b>IRP major function code</b>
+    </p>
+  </a> <a href="https://msdn.microsoft.com/en-us/library/windows/hardware/ff550710%28v=vs.85%29.aspx"><img src="FastFat%20OverView.html_files/ilink.png" alt="User Link" style="border-width:0" /></a></div><div class="content" id="N10188"><div class="node"><img src="FastFat%20OverView.html_files/leaf.png" class="hideshow" alt="leaf" /><a id="FMID_1454447487FM" /><div class="nodecontent">TODO: Complete docs for this node and beyond</div></div><div class="node"><img src="FastFat%20OverView.html_files/hide.png" class="hideshow" alt="hide" onClick="toggle(&quot;N101A8&quot;)" id="imgN101A8" /><a id="FMID_95360256FM" /><div class="nodecontent">
+    <p>
+      IRP_MJ_CREATE utilizes <b>VfatCreate()</b>
+    </p>
+  </div><div class="content" id="N101A8"><div class="node"><img src="FastFat%20OverView.html_files/leaf.png" class="hideshow" alt="leaf" /><a id="FMID_412598684FM" /><div class="nodecontent">Opening the filesystem is pretty simple</div></div><div class="node"><img src="FastFat%20OverView.html_files/leaf.png" class="hideshow" alt="leaf" /><a id="FMID_755606753FM" /><div class="nodecontent">So is checking for IRPCONTEXT_CANWAIT and returning the results of VfatMarkIrpContextForQueue()</div></div><div class="node"><img src="FastFat%20OverView.html_files/leaf.png" class="hideshow" alt="leaf" /><a id="FMID_348287713FM" /><div class="nodecontent">Calls ExAcquireResourceExclusiveLite()</div></div><div class="node"><img src="FastFat%20OverView.html_files/leaf.png" class="hideshow" alt="leaf" /><a id="FMID_167589571FM" /><div class="nodecontent">Calls VfatCreateFile()</div></div><div class="node"><img src="FastFat%20OverView.html_files/leaf.png" class="hideshow" alt="leaf" /><a id="FMID_1034544450FM" /><div class="nodecontent">Calls ExReleaseResourceLite()</div></div></div></div><div class="node"><img src="FastFat%20OverView.html_files/leaf.png" class="hideshow" alt="leaf" /><a id="FMID_1958077126FM" /><div class="nodecontent">IRP_MJ_READ - VfatRead()</div></div><div class="node"><img src="FastFat%20OverView.html_files/leaf.png" class="hideshow" alt="leaf" /><a id="FMID_1318684954FM" /><div class="nodecontent">IRP_MJ_WRITE - VfatWrite()</div></div></div></div><div class="node"><img src="FastFat%20OverView.html_files/leaf.png" class="hideshow" alt="leaf" /><img src="FastFat%20OverView.html_files/icons/full-3.png" alt="full-3" /> <a id="FMID_1232198276FM" /><div class="nodecontent"><a href="https://msdn.microsoft.com/en-us/library/windows/hardware/ff548343%28v=vs.85%29.aspx">
+    <p>
+      Calls <b>IoCompleteRequest()</b> if the IRP's flags indicate completion.
+    </p>
+  </a> <a href="https://msdn.microsoft.com/en-us/library/windows/hardware/ff548343%28v=vs.85%29.aspx"><img src="FastFat%20OverView.html_files/ilink.png" alt="User Link" style="border-width:0" /></a></div></div><div class="node"><img src="FastFat%20OverView.html_files/leaf.png" class="hideshow" alt="leaf" /><img src="FastFat%20OverView.html_files/icons/full-4.png" alt="full-4" /> <a id="FMID_964756434FM" /><div class="nodecontent"><a href="http://doxygen.reactos.org/de/d72/drivers_2filesystems_2fastfat_2misc_8c_ad4f74bdae40075c2356bac1307151c30.html#ad4f74bdae40075c2356bac1307151c30">
+    <p>
+      It either queues the IRP context with <b>VfatQueueRequest()</b>
+    </p>
+  </a> <a href="http://doxygen.reactos.org/de/d72/drivers_2filesystems_2fastfat_2misc_8c_ad4f74bdae40075c2356bac1307151c30.html#ad4f74bdae40075c2356bac1307151c30"><img src="FastFat%20OverView.html_files/ilink.png" alt="User Link" style="border-width:0" /></a></div></div><div class="node"><img src="FastFat%20OverView.html_files/leaf.png" class="hideshow" alt="leaf" /><img src="FastFat%20OverView.html_files/icons/full-4.png" alt="full-4" /> <a id="FMID_1221722694FM" /><div class="nodecontent"><a href="http://doxygen.reactos.org/de/d72/drivers_2filesystems_2fastfat_2misc_8c_a041a7f149573da3904d705ed0305b830.html#a041a7f149573da3904d705ed0305b830">
+    <p>
+      ...or frees the IRP context with <b>VfatFreeIrpContext()</b>
+    </p>
+  </a> <a href="http://doxygen.reactos.org/de/d72/drivers_2filesystems_2fastfat_2misc_8c_a041a7f149573da3904d705ed0305b830.html#a041a7f149573da3904d705ed0305b830"><img src="FastFat%20OverView.html_files/ilink.png" alt="User Link" style="border-width:0" /></a></div></div><div class="node"><img src="FastFat%20OverView.html_files/leaf.png" class="hideshow" alt="leaf" /><img src="FastFat%20OverView.html_files/icons/full-5.png" alt="full-5" /> <a id="FMID_1492253843FM" /><div class="nodecontent"><a href="https://msdn.microsoft.com/en-us/library/windows/hardware/ff545908%28v=vs.85%29.aspx">
+    <p>
+      Calls <b>FsRtlExitFileSystem()</b> to re-enable delivery of normal APC/s
+    </p>
+  </a> <a href="https://msdn.microsoft.com/en-us/library/windows/hardware/ff545908%28v=vs.85%29.aspx"><img src="FastFat%20OverView.html_files/ilink.png" alt="User Link" style="border-width:0" /></a></div></div><div class="node"><img src="FastFat%20OverView.html_files/leaf.png" class="hideshow" alt="leaf" /><img src="FastFat%20OverView.html_files/icons/full-6.png" alt="full-6" /> <a id="FMID_376486655FM" /><div class="nodecontent">Returns status</div></div></div></div></div></div></div></div></div></div>
+</body></html>
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+
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+
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+	margin-top:1em;
+	font-style:italic;
+	text-align:center;
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+/* Thanks to wolfgangradke, https://sourceforge.net/forum/message.php?msg_id=5991663 */
+div.nodecontent > p {
+	margin-top:0pt;
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+
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@@ -0,0 +1,76 @@
+body { 
+  background-color: #FFFFFF;
+}
+
+div.node { 
+  padding-bottom:     1ex;
+  padding-left:       2em;
+}
+
+div.cloud { 
+  padding-bottom:     1ex;
+  padding-left:       2em;
+  background-color:   #C0C0FF;
+  border-width:       2px;
+  border-style:       solid;
+  border-color:       #A0A0FF;
+}
+
+div.content { 
+  border-width:       1px;
+  border-style:   dashed;
+  border-color:       #C0C0C0;
+}
+
+img.hideshow { 
+  padding-right: 1ex;
+}
+
+img.ilink { 
+  border-width: 0px;
+  padding-left: 1ex;
+}
+
+/* for notes and image export, fc, 18.7.2005. */
+.images {
+ max-width:50%;
+}
+
+.nodecontent {display:inline;}
+
+.note-and-attributes {
+ margin-left:10%;
+ color:#0000FF;
+}
+
+table.attributes {
+	border-collapse:collapse;
+	empty-cells:show;
+	border:thin black solid;
+}
+table.attributes td,th {
+	border:thin black solid;
+	padding-top:2px;
+	padding-bottom:2px;
+	padding-left:3px;
+	padding-right:3px;
+}
+table.attributes th {
+	text-align:center;
+}
+table.attributes caption {
+	margin-top:1em;
+	font-style:italic;
+	text-align:center;
+}
+/* Thanks to wolfgangradke, https://sourceforge.net/forum/message.php?msg_id=5991663 */
+div.nodecontent > p {
+	margin-top:0pt;
+	margin-bottom:0pt;
+	display:inline;
+}
+
+p + p { 
+ 	margin-top: 0.5em !important;
+	display:block !important;
+}
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Index: documentation/articles/FastFat Overview/FastFat OverView.mm
===================================================================
--- documentation/articles/FastFat Overview/FastFat OverView.mm	(nonexistent)
+++ documentation/articles/FastFat Overview/FastFat OverView.mm	(working copy)
@@ -0,0 +1,293 @@
+<map version="1.0.1">
+<!-- To view this file, download free mind mapping software FreeMind from http://freemind.sourceforge.net -->
+<node CREATED="1458047093486" ID="ID_739277139" MODIFIED="1458139156191">
+<richcontent TYPE="NODE"><html>
+  <head>
+    
+  </head>
+  <body>
+    <p style="text-align: center">
+      <font size="5"><b>FastFat Driver </b></font>
+    </p>
+    <p style="text-align: center">
+      <font size="3"><b>a simplified&#160;tour</b></font>
+    </p>
+    <p style="text-align: center">
+      
+    </p>
+    <p style="text-align: center">
+      <font size="4"><b>DriverEntry()</b></font>
+    </p>
+    <p>
+      Sets up callbacks for each of the Major IRP function codes; Each function code is given the same dispatcher, VfatBuildRequest().
+    </p>
+    <p>
+      
+    </p>
+  </body>
+</html>
+</richcontent>
+<node CREATED="1458139161067" ID="ID_837222004" LINK="https://msdn.microsoft.com/en-us/library/windows/hardware/ff551834%28v=vs.85%29.aspx" MODIFIED="1458139181094" POSITION="right" TEXT="Ref: Installable File System Drivers"/>
+<node CREATED="1458047227305" ID="ID_699033480" LINK="http://doxygen.reactos.org/de/d72/drivers_2filesystems_2fastfat_2misc_8c_source.html#l00214" MODIFIED="1458141425149" POSITION="right">
+<richcontent TYPE="NODE"><html>
+  <head>
+    
+  </head>
+  <body>
+    <p style="text-align: center">
+      <font size="4"><b>VfatBuildRequest() </b></font>
+    </p>
+    <p>
+      As the only IRP dispatcher, VfatBuildRequest() is effectively called by the OS I/O Manager to complete each I/O operation.
+    </p>
+    <p>
+      
+    </p>
+    <p>
+      It takes the following parameters:
+    </p>
+    <ul>
+      <li>
+        pointer to a DEVICE_OBJECT
+      </li>
+      <li>
+        pointer to an I/O request packet (IRP)
+      </li>
+    </ul>
+  </body>
+</html>
+</richcontent>
+<node CREATED="1458047406639" ID="ID_452655722" MODIFIED="1458050396978">
+<richcontent TYPE="NODE"><html>
+  <head>
+    
+  </head>
+  <body>
+    <p>
+      Parameters of VfatBuildRequest()
+    </p>
+    <p>
+      and of VfatAllocateIrpContext()
+    </p>
+  </body>
+</html>
+</richcontent>
+<node CREATED="1458049815196" ID="ID_1350704534" LINK="https://msdn.microsoft.com/en-us/library/windows/hardware/ff543147%28v=vs.85%29.aspx" MODIFIED="1458049877082" TEXT="pointer to a DEVICE OBJECT"/>
+<node CREATED="1458049884292" ID="ID_1210519863" LINK="https://msdn.microsoft.com/en-us/library/windows/hardware/ff550694%28v=vs.85%29.aspx" MODIFIED="1458135310385">
+<richcontent TYPE="NODE"><html>
+  <head>
+    
+  </head>
+  <body>
+    <p>
+      pointer to an <b>I/O request packet (IRP)</b>
+    </p>
+  </body>
+</html>
+</richcontent>
+<node CREATED="1458134938563" ID="ID_371897619" LINK="https://msdn.microsoft.com/en-us/library/windows/hardware/ff546847%28v=vs.85%29.aspx#" MODIFIED="1458134955949" TEXT="Ref: Handling IRPs"/>
+</node>
+</node>
+<node CREATED="1458050806238" ID="ID_1089090939" LINK="https://msdn.microsoft.com/en-us/library/windows/hardware/ff554754%28v=vs.85%29.aspx" MODIFIED="1458133942527">
+<richcontent TYPE="NODE"><html>
+  <head>
+    
+  </head>
+  <body>
+    <p>
+      Uses <b>IRP context </b>(link discusses the same concept but for RDBSS)
+    </p>
+  </body>
+</html>
+</richcontent>
+</node>
+<node CREATED="1458050202241" ID="ID_1433880999" MODIFIED="1458078587143">
+<richcontent TYPE="NODE"><html>
+  <head>
+    
+  </head>
+  <body>
+    <p>
+      Creates a FAT-specific IRP Context by passing its parameters to VfatAllocateIrpContext()
+    </p>
+  </body>
+</html>
+</richcontent>
+<icon BUILTIN="full-1"/>
+<node CREATED="1458050417845" ID="ID_745022269" LINK="http://doxygen.reactos.org/de/d72/drivers_2filesystems_2fastfat_2misc_8c_ae29e8fafb5f803400319a007160e6105.html" MODIFIED="1458078540465">
+<richcontent TYPE="NODE"><html>
+  <head>
+    
+  </head>
+  <body>
+    <p style="text-align: center">
+      <b>VfatAllocateIrpContext() </b>
+    </p>
+    <p style="text-align: left">
+      Allocates and initializes a new, fat-specific IRP context and returns it.
+    </p>
+  </body>
+</html></richcontent>
+<node CREATED="1458077115463" ID="ID_824613332" LINK="https://msdn.microsoft.com/en-us/library/windows/hardware/ff544388%28v=vs.85%29.aspx" MODIFIED="1458077284302">
+<richcontent TYPE="NODE"><html>
+  <head>
+    
+  </head>
+  <body>
+    <p>
+      Calls <b>ExAllocateFromNPagedLookasideList()</b>&#160;to reserve memory for the IRP context
+    </p>
+  </body>
+</html></richcontent>
+<icon BUILTIN="full-1"/>
+<node CREATED="1458130610008" ID="ID_218295150" LINK="https://msdn.microsoft.com/en-us/library/windows/hardware/ff565416%28v=vs.85%29.aspx" MODIFIED="1458130628134" TEXT="Ref: Using Lookaside Lists"/>
+</node>
+<node CREATED="1458077201431" ID="ID_484298343" MODIFIED="1458077332683" TEXT="Initializes members of the IRP context">
+<icon BUILTIN="full-2"/>
+</node>
+<node CREATED="1458077335801" ID="ID_1647960170" LINK="http://doxygen.reactos.org/da/dfc/structVFAT__IRP__CONTEXT.html" MODIFIED="1458078101782">
+<richcontent TYPE="NODE"><html>
+  <head>
+    
+  </head>
+  <body>
+    <p>
+      Returns a pointer to the IRP context it created, a <b>VFAT_IRP_CONTEXT</b>
+    </p>
+  </body>
+</html></richcontent>
+<icon BUILTIN="full-3"/>
+</node>
+</node>
+</node>
+<node CREATED="1458078684970" ID="ID_316028212" MODIFIED="1458078711398" TEXT="Passes the IRP context to VfatDispatchRequest(), which handles the remainder of the operation.">
+<icon BUILTIN="full-2"/>
+<node CREATED="1458078729442" ID="ID_1670207119" LINK="http://doxygen.reactos.org/de/d72/drivers_2filesystems_2fastfat_2misc_8c_a90fb5735736cba89a74a5c63de23f3f4.html#a90fb5735736cba89a74a5c63de23f3f4" MODIFIED="1458138959989">
+<richcontent TYPE="NODE"><html>
+  <head>
+    
+  </head>
+  <body>
+    <p style="text-align: center">
+      <b>VfatDispatchRequest() </b>
+    </p>
+    <p style="text-align: left">
+      Processes the I/O request packet (IRP).
+    </p>
+  </body>
+</html>
+</richcontent>
+<node CREATED="1458134863984" ID="ID_1965031639" LINK="https://msdn.microsoft.com/en-us/library/windows/hardware/ff566407%28v=vs.85%29.aspx" MODIFIED="1458134875549" TEXT="Ref: Writing Dispatch Routines"/>
+<node CREATED="1458135808373" ID="ID_1638216698" LINK="https://msdn.microsoft.com/en-us/library/windows/hardware/ff545900%28v=vs.85%29.aspx" MODIFIED="1458136120297">
+<richcontent TYPE="NODE"><html>
+  <head>
+    
+  </head>
+  <body>
+    <p>
+      Calls <b>FsRtlEnterFileSystem()</b>&#160;to disable normal APC's.
+    </p>
+  </body>
+</html>
+</richcontent>
+<icon BUILTIN="full-1"/>
+</node>
+<node CREATED="1458134529754" ID="ID_684755198" LINK="https://msdn.microsoft.com/en-us/library/windows/hardware/ff550710%28v=vs.85%29.aspx" MODIFIED="1458136127297">
+<richcontent TYPE="NODE"><html>
+  <head>
+    
+  </head>
+  <body>
+    <p>
+      Passes the IRP context to the appropriate handler, based on <b>IRP major function code</b>
+    </p>
+  </body>
+</html>
+</richcontent>
+<icon BUILTIN="full-2"/>
+<node CREATED="1458238450437" ID="ID_1454447487" MODIFIED="1458238483377" TEXT="TODO: Complete docs for this node and beyond"/>
+<node CREATED="1458136380246" ID="ID_95360256" MODIFIED="1458141616646">
+<richcontent TYPE="NODE"><html>
+  <head>
+    
+  </head>
+  <body>
+    <p>
+      IRP_MJ_CREATE utilizes <b>VfatCreate()</b>
+    </p>
+  </body>
+</html>
+</richcontent>
+<node CREATED="1458141618432" ID="ID_412598684" MODIFIED="1458141758052" TEXT="Opening the filesystem is pretty simple"/>
+<node CREATED="1458141774488" ID="ID_755606753" MODIFIED="1458141859956" TEXT="So is checking for IRPCONTEXT_CANWAIT and returning the results of VfatMarkIrpContextForQueue()"/>
+<node CREATED="1458141863424" ID="ID_348287713" MODIFIED="1458141933844" TEXT="Calls ExAcquireResourceExclusiveLite()"/>
+<node CREATED="1458141934680" ID="ID_167589571" MODIFIED="1458141945037" TEXT="Calls VfatCreateFile()"/>
+<node CREATED="1458141953537" ID="ID_1034544450" MODIFIED="1458141957756" TEXT="Calls ExReleaseResourceLite()"/>
+</node>
+<node CREATED="1458141578824" ID="ID_1958077126" MODIFIED="1458141591620" TEXT="IRP_MJ_READ - VfatRead()"/>
+<node CREATED="1458141592920" ID="ID_1318684954" MODIFIED="1458141611317" TEXT="IRP_MJ_WRITE - VfatWrite()"/>
+</node>
+<node CREATED="1458136135461" ID="ID_1232198276" LINK="https://msdn.microsoft.com/en-us/library/windows/hardware/ff548343%28v=vs.85%29.aspx" MODIFIED="1458136468556">
+<richcontent TYPE="NODE"><html>
+  <head>
+    
+  </head>
+  <body>
+    <p>
+      Calls <b>IoCompleteRequest()</b>&#160;if the IRP's flags indicate completion.
+    </p>
+  </body>
+</html>
+</richcontent>
+<icon BUILTIN="full-3"/>
+</node>
+<node CREATED="1458136531467" ID="ID_964756434" LINK="http://doxygen.reactos.org/de/d72/drivers_2filesystems_2fastfat_2misc_8c_ad4f74bdae40075c2356bac1307151c30.html#ad4f74bdae40075c2356bac1307151c30" MODIFIED="1458139056841">
+<richcontent TYPE="NODE"><html>
+  <head>
+    
+  </head>
+  <body>
+    <p>
+      It either queues the IRP context with <b>VfatQueueRequest()</b>
+    </p>
+  </body>
+</html>
+</richcontent>
+<icon BUILTIN="full-4"/>
+</node>
+<node CREATED="1458136611975" ID="ID_1221722694" LINK="http://doxygen.reactos.org/de/d72/drivers_2filesystems_2fastfat_2misc_8c_a041a7f149573da3904d705ed0305b830.html#a041a7f149573da3904d705ed0305b830" MODIFIED="1458139076574">
+<richcontent TYPE="NODE"><html>
+  <head>
+    
+  </head>
+  <body>
+    <p>
+      ...or frees the IRP context with <b>VfatFreeIrpContext()</b>
+    </p>
+  </body>
+</html>
+</richcontent>
+<icon BUILTIN="full-4"/>
+</node>
+<node CREATED="1458136928959" ID="ID_1492253843" LINK="https://msdn.microsoft.com/en-us/library/windows/hardware/ff545908%28v=vs.85%29.aspx" MODIFIED="1458137001150">
+<richcontent TYPE="NODE"><html>
+  <head>
+    
+  </head>
+  <body>
+    <p>
+      Calls <b>FsRtlExitFileSystem()</b>&#160;to re-enable delivery of normal APC/s
+    </p>
+  </body>
+</html>
+</richcontent>
+<icon BUILTIN="full-5"/>
+</node>
+<node CREATED="1458137014399" ID="ID_376486655" MODIFIED="1458137027779" TEXT="Returns status">
+<icon BUILTIN="full-6"/>
+</node>
+</node>
+</node>
+</node>
+</node>
+</map>
Index: documentation/articles/FastFat Overview/ReadMe.html
===================================================================
--- documentation/articles/FastFat Overview/ReadMe.html	(nonexistent)
+++ documentation/articles/FastFat Overview/ReadMe.html	(working copy)
@@ -0,0 +1,19 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+	<meta charset="utf-8">
+	<title>ReadMe</title>
+</head>
+
+<body>
+	<div style="width: 900px; margin: auto">
+	<p>This is a graphical, hierarchical walkthrough of ReactOS' FastFat driver. It's intended to supplement the FastFat source to quickly familiarize developers with Windows filesystem driver development.</p>
+	<p>
+It was created with FreeMind, which you can get <a href="http://freemind.sourceforge.net/wiki/index.php/Download">here</a>. An XHTML export is included, but the file is more useful in FreeMind because the links work better.</p>
+	<p>
+It contains many links to MSDN references, as well as ReactOS source. These links and this document itself will likely become outdated over time. If you notice any dead links, please do your part to keep it up-to-date :)
+	</p>
+	</div>
+
+</body>
+</html>
\ No newline at end of file
