sys: initial fast I/O support

build/VStudio/winfsp.vcxproj

@@ -125,12 +125,13 @@
     <ClCompile Include="..\..\src\sys\dirctrl.c" />
     <ClCompile Include="..\..\src\sys\driver.c" />
     <ClCompile Include="..\..\src\sys\ea.c" />
+    <ClCompile Include="..\..\src\sys\fastio.c" />
     <ClCompile Include="..\..\src\sys\fileinfo.c" />
     <ClCompile Include="..\..\src\sys\flush.c" />
     <ClCompile Include="..\..\src\sys\fsctrl.c" />
     <ClCompile Include="..\..\src\sys\lockctrl.c" />
     <ClCompile Include="..\..\src\sys\read.c" />
-    <ClCompile Include="..\..\src\sys\seinfo.c" />
+    <ClCompile Include="..\..\src\sys\security.c" />
     <ClCompile Include="..\..\src\sys\shutdown.c" />
     <ClCompile Include="..\..\src\sys\volinfo.c" />
     <ClCompile Include="..\..\src\sys\write.c" />

build/VStudio/winfsp.vcxproj.filters

@@ -57,10 +57,13 @@
     <ClCompile Include="..\..\src\sys\ea.c">
       <Filter>Source Files</Filter>
     </ClCompile>
-    <ClCompile Include="..\..\src\sys\seinfo.c">
+    <ClCompile Include="..\..\src\sys\shutdown.c">
       <Filter>Source Files</Filter>
     </ClCompile>
-    <ClCompile Include="..\..\src\sys\shutdown.c">
+    <ClCompile Include="..\..\src\sys\security.c">
+      <Filter>Source Files</Filter>
+    </ClCompile>
+    <ClCompile Include="..\..\src\sys\fastio.c">
       <Filter>Source Files</Filter>
     </ClCompile>
   </ItemGroup>

src/sys/driver.c

@@ -64,6 +64,38 @@ DriverEntry(
     DriverObject->MajorFunction[IRP_MJ_SET_QUOTA] = 0;
     DriverObject->MajorFunction[IRP_MJ_PNP] = 0;
 
+    /* setup fast I/O */
+    static FAST_IO_DISPATCH FspFastIoDispatch = { 0 };
+    FspFastIoDispatch.SizeOfFastIoDispatch = sizeof FspFastIoDispatch;
+    FspFastIoDispatch.FastIoCheckIfPossible = FspFastIoCheckIfPossible;
+    FspFastIoDispatch.FastIoRead = FsRtlCopyRead;
+    FspFastIoDispatch.FastIoWrite = FsRtlCopyWrite;
+    FspFastIoDispatch.FastIoQueryBasicInfo = 0;
+    FspFastIoDispatch.FastIoQueryStandardInfo = 0;
+    FspFastIoDispatch.FastIoLock = 0;
+    FspFastIoDispatch.FastIoUnlockSingle = 0;
+    FspFastIoDispatch.FastIoUnlockAll = 0;
+    FspFastIoDispatch.FastIoUnlockAllByKey = 0;
+    FspFastIoDispatch.FastIoDeviceControl = 0;
+    FspFastIoDispatch.AcquireFileForNtCreateSection = 0;
+    FspFastIoDispatch.ReleaseFileForNtCreateSection = 0;
+    FspFastIoDispatch.FastIoDetachDevice = 0;
+    FspFastIoDispatch.FastIoQueryNetworkOpenInfo = 0;
+    FspFastIoDispatch.AcquireForModWrite = 0;
+    FspFastIoDispatch.MdlRead = FsRtlMdlReadDev;
+    FspFastIoDispatch.MdlReadComplete = FsRtlMdlReadCompleteDev;
+    FspFastIoDispatch.PrepareMdlWrite = FsRtlPrepareMdlWriteDev;
+    FspFastIoDispatch.MdlWriteComplete = FsRtlMdlWriteCompleteDev;
+    FspFastIoDispatch.FastIoReadCompressed = 0;
+    FspFastIoDispatch.FastIoWriteCompressed = 0;
+    FspFastIoDispatch.MdlReadCompleteCompressed = 0;
+    FspFastIoDispatch.MdlWriteCompleteCompressed = 0;
+    FspFastIoDispatch.FastIoQueryOpen = 0;
+    FspFastIoDispatch.ReleaseForModWrite = 0;
+    FspFastIoDispatch.AcquireForCcFlush = 0;
+    FspFastIoDispatch.ReleaseForCcFlush = 0;
+    DriverObject->FastIoDispatch = &FspFastIoDispatch;
+
     return STATUS_SUCCESS;
 }
 

src/sys/driver.h

@@ -7,7 +7,7 @@
 #ifndef WINFSP_SYS_DRIVER_H_INCLUDED
 #define WINFSP_SYS_DRIVER_H_INCLUDED
 
-#include <wdm.h>
+#include <ntifs.h>
 
 #define DRIVER_NAME                     "winfsp"
 
@@ -39,4 +39,7 @@ DRIVER_DISPATCH FspSetVolumeInformation;
 DRIVER_DISPATCH FspShutdown;
 DRIVER_DISPATCH FspWrite;
 
+/* fast I/O */
+FAST_IO_CHECK_IF_POSSIBLE FspFastIoCheckIfPossible;
+
 #endif

src/sys/fastio.c

@@ -0,0 +1,37 @@
+/**
+ * @file sys/fastio.c
+ *
+ * @copyright 2015 Bill Zissimopoulos
+ */
+
+#include <sys/driver.h>
+
+FAST_IO_CHECK_IF_POSSIBLE FspFastIoCheckIfPossible;
+
+#ifdef ALLOC_PRAGMA
+#pragma alloc_text(PAGE, FspFastIoCheckIfPossible)
+#endif
+
+BOOLEAN
+FspFastIoCheckIfPossible(
+    _In_ PFILE_OBJECT FileObject,
+    _In_ PLARGE_INTEGER FileOffset,
+    _In_ ULONG Length,
+    _In_ BOOLEAN Wait,
+    _In_ ULONG LockKey,
+    _In_ BOOLEAN CheckForReadOperation,
+    _Out_ PIO_STATUS_BLOCK IoStatus,
+    _In_ PDEVICE_OBJECT DeviceObject
+    )
+{
+    UNREFERENCED_PARAMETER(FileObject);
+    UNREFERENCED_PARAMETER(FileOffset);
+    UNREFERENCED_PARAMETER(Length);
+    UNREFERENCED_PARAMETER(Wait);
+    UNREFERENCED_PARAMETER(LockKey);
+    UNREFERENCED_PARAMETER(CheckForReadOperation);
+    UNREFERENCED_PARAMETER(IoStatus);
+    UNREFERENCED_PARAMETER(DeviceObject);
+
+    return FALSE;
+}