[FASTFAT]

Implement support for FastIO for:
- FastIoQueryBasicInfo
- FastIoQueryStandardInfo

Now, with this commit and the two previous, ReactOS won't attempt to issue an IRP for these query, but will directly go with the FastIO path.
The performance improvement is really visible in 1st stage (at least, here with VBox).

svn path=/trunk/; revision=67824

reactos/drivers/filesystems/fastfat/fastio.c

@@ -1,9 +1,10 @@
 /*
- * FILE:             drivers/fs/vfat/fastio.c
+ * FILE:             drivers/filesystems/fastfat/fastio.c
  * PURPOSE:          Fast IO routines.
  * COPYRIGHT:        See COPYING in the top level directory
  * PROJECT:          ReactOS kernel
  * PROGRAMMER:       Herve Poussineau (hpoussin@reactos.org)
+ *                   Pierre Schweitzer (pierre@reactos.org)
  */
 
 #include "vfat.h"
@@ -111,15 +112,51 @@ VfatFastIoQueryBasicInfo(
     OUT PIO_STATUS_BLOCK IoStatus,
     IN PDEVICE_OBJECT DeviceObject)
 {
+    NTSTATUS Status;
+    PVFATFCB FCB = NULL;
+    BOOLEAN Success = FALSE;
+    ULONG BufferLength = sizeof(FILE_BASIC_INFORMATION);
+
     DPRINT("VfatFastIoQueryBasicInfo()\n");
 
-    UNREFERENCED_PARAMETER(FileObject);
-    UNREFERENCED_PARAMETER(Wait);
-    UNREFERENCED_PARAMETER(Buffer);
-    UNREFERENCED_PARAMETER(IoStatus);
-    UNREFERENCED_PARAMETER(DeviceObject);
+    FCB = (PVFATFCB)FileObject->FsContext;
+    if (FCB == NULL)
+    {
+        return FALSE;
+    }
 
-    return FALSE;
+    FsRtlEnterFileSystem();
+
+    if (!(FCB->Flags & FCB_IS_PAGE_FILE))
+    {
+        if (!ExAcquireResourceSharedLite(&FCB->MainResource, Wait))
+        {
+            FsRtlExitFileSystem();
+            return FALSE;
+        }
+    }
+
+    Status = VfatGetBasicInformation(FileObject,
+                                     FCB,
+                                     DeviceObject,
+                                     Buffer,
+                                     &BufferLength);
+
+    if (!(FCB->Flags & FCB_IS_PAGE_FILE))
+    {
+        ExReleaseResourceLite(&FCB->MainResource);
+    }
+
+    if (NT_SUCCESS(Status))
+    {
+        IoStatus->Status = STATUS_SUCCESS;
+        IoStatus->Information = sizeof(FILE_BASIC_INFORMATION) - BufferLength;
+        Success = TRUE;
+    }
+
+    FsRtlExitFileSystem();
+
+    return Success;
 }
 
 static FAST_IO_QUERY_STANDARD_INFO VfatFastIoQueryStandardInfo;
@@ -134,15 +171,51 @@ VfatFastIoQueryStandardInfo(
     OUT PIO_STATUS_BLOCK IoStatus,
     IN PDEVICE_OBJECT DeviceObject)
 {
-    DPRINT("VfatFastIoQueryStandardInfo\n");
+    NTSTATUS Status;
+    PVFATFCB FCB = NULL;
+    BOOLEAN Success = FALSE;
+    ULONG BufferLength = sizeof(FILE_STANDARD_INFORMATION);
+
+    DPRINT("VfatFastIoQueryStandardInfo()\n");
 
-    UNREFERENCED_PARAMETER(FileObject);
-    UNREFERENCED_PARAMETER(Wait);
-    UNREFERENCED_PARAMETER(Buffer);
-    UNREFERENCED_PARAMETER(IoStatus);
     UNREFERENCED_PARAMETER(DeviceObject);
 
-    return FALSE;
+    FCB = (PVFATFCB)FileObject->FsContext;
+    if (FCB == NULL)
+    {
+        return FALSE;
+    }
+
+    FsRtlEnterFileSystem();
+
+    if (!(FCB->Flags & FCB_IS_PAGE_FILE))
+    {
+        if (!ExAcquireResourceSharedLite(&FCB->MainResource, Wait))
+        {
+            FsRtlExitFileSystem();
+            return FALSE;
+        }
+    }
+
+    Status = VfatGetStandardInformation(FCB,
+                                        Buffer,
+                                        &BufferLength);
+
+    if (!(FCB->Flags & FCB_IS_PAGE_FILE))
+    {
+        ExReleaseResourceLite(&FCB->MainResource);
+    }
+
+    if (NT_SUCCESS(Status))
+    {
+        IoStatus->Status = STATUS_SUCCESS;
+        IoStatus->Information = sizeof(FILE_STANDARD_INFORMATION) - BufferLength;
+        Success = TRUE;
+    }
+
+    FsRtlExitFileSystem();
+
+    return Success;
 }
 
 static FAST_IO_LOCK VfatFastIoLock;

reactos/drivers/filesystems/fastfat/finfo.c

@@ -71,7 +71,6 @@ const char* FileInformationClassNames[] =
 /*
  * FUNCTION: Retrieve the standard file information
  */
-static
 NTSTATUS
 VfatGetStandardInformation(
     PVFATFCB FCB,
@@ -236,7 +235,6 @@ VfatSetBasicInformation(
     return STATUS_SUCCESS;
 }
 
-static
 NTSTATUS
 VfatGetBasicInformation(
     PFILE_OBJECT FileObject,

reactos/drivers/filesystems/fastfat/vfat.h

@@ -874,6 +874,20 @@ vfatMakeFCBFromDirEntry(
 
 /* finfo.c */
 
+NTSTATUS
+VfatGetStandardInformation(
+    PVFATFCB FCB,
+    PFILE_STANDARD_INFORMATION StandardInfo,
+    PULONG BufferLength);
+
+NTSTATUS
+VfatGetBasicInformation(
+    PFILE_OBJECT FileObject,
+    PVFATFCB FCB,
+    PDEVICE_OBJECT DeviceObject,
+    PFILE_BASIC_INFORMATION BasicInfo,
+    PULONG BufferLength);
+
 NTSTATUS
 VfatQueryInformation(
     PVFAT_IRP_CONTEXT IrpContext);