From: short <>
Date: Wed, 26 Mar 2003 00:51:30 +0000 (+0000)
Subject: W32 (ntfs) expects CreatedDeviceObject->Size to cover even 'DeviceExtensionSize'
X-Git-Tag: captive-0_2~30
X-Git-Url: http://git.jankratochvil.net/?p=reactos.git;a=commitdiff_plain;h=3e2cf4f931b953aa872d6c900b58b90594cbf704

W32 (ntfs) expects CreatedDeviceObject->Size to cover even 'DeviceExtensionSize'
 - Undocumented by W32!
Magic value 0x0701 @0x28 of CreatedDeviceObject->DeviceExtension
  expected by ntfs.sys NT5.1sp1 _NtfsInitializeIrpContext()
 - Undocumented by W32!
---

diff --git a/ntoskrnl/io/device.c b/ntoskrnl/io/device.c
index 40551eb..4432332 100644
--- a/ntoskrnl/io/device.c
+++ b/ntoskrnl/io/device.c
@@ -637,6 +637,7 @@ IoCreateDevice(PDRIVER_OBJECT DriverObject,
    assert(sizeof(CreatedDeviceObject->Dpc) == 32);
    assert(sizeof(CreatedDeviceObject->DeviceLock) == 16);
    assert(sizeof(DEVICE_OBJECT) == 184);
+   assert(sizeof(DEVICE_OBJECT) == 0xB8);
 
    if (DeviceName != NULL)
      {
@@ -704,7 +705,10 @@ IoCreateDevice(PDRIVER_OBJECT DriverObject,
      }
   
   CreatedDeviceObject->Type = DeviceType;
-  CreatedDeviceObject->Size = sizeof (*CreatedDeviceObject);
+   /* W32 (ntfs) expects CreatedDeviceObject->Size to cover even 'DeviceExtensionSize'.
+    * Undocumented by W32!
+    */
+  CreatedDeviceObject->Size = sizeof (DEVICE_OBJECT) + DeviceExtensionSize;
   CreatedDeviceObject->ReferenceCount = 0;	/* or 1? it is floating unused this way */
   CreatedDeviceObject->DriverObject = DriverObject;
   CreatedDeviceObject->CurrentIrp = NULL;
@@ -737,6 +741,13 @@ IoCreateDevice(PDRIVER_OBJECT DriverObject,
 		    DeviceExtensionSize);
     }
 
+#ifdef LIBCAPTIVE
+  /* Magic value expected by ntfs.sys NT5.1sp1 _NtfsInitializeIrpContext()
+   */
+  if (DeviceExtensionSize>=0x30)
+    *(USHORT *)(((UCHAR *)CreatedDeviceObject->DeviceExtension)+0x28)=0x0701;
+#endif /* LIBCAPTIVE */
+
   CreatedDeviceObject->AttachedDevice = NULL;
   CreatedDeviceObject->DeviceType = DeviceType;
   CreatedDeviceObject->StackSize = 1;