[pschweitzer] 49369: [DISK] Implemented support for IOCTL_DISK_GET_LENGTH_INFO

Author: pschweitzer
Date: Sun Oct 31 08:13:33 2010
New Revision: 49369

URL: http://svn.reactos.org/svn/reactos?rev=49369&view=rev
Log:
[DISK]
Implemented support for IOCTL_DISK_GET_LENGTH_INFO

Modified:
    trunk/reactos/drivers/storage/class/disk/disk.c

Modified: trunk/reactos/drivers/storage/class/disk/disk.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/drivers/storage/class/disk…
==============================================================================
--- trunk/reactos/drivers/storage/class/disk/disk.c [iso-8859-1] (original)
+++ trunk/reactos/drivers/storage/class/disk/disk.c [iso-8859-1] Sun Oct 31 08:13:33 2010
@@ -2808,6 +2808,53 @@
         // Fall through and let the class driver process the request.
         //
 
+    case IOCTL_DISK_GET_LENGTH_INFO:
+
+        //
+        // Validate buffer length.
+        //
+
+        if (irpStack->Parameters.DeviceIoControl.OutputBufferLength <
+            sizeof(GET_LENGTH_INFORMATION)) {
+            status = STATUS_BUFFER_TOO_SMALL;
+
+        } else {
+
+            PGET_LENGTH_INFORMATION lengthInformation =
Irp->AssociatedIrp.SystemBuffer;
+
+            //
+            // Update the geometry in case it has changed.
+            //
+
+            status = UpdateRemovableGeometry (DeviceObject, Irp);
+
+            if (!NT_SUCCESS(status)) {
+
+                //
+                // Note the drive is not ready.
+                //
+
+                diskData->DriveNotReady = TRUE;
+                break;
+            }
+
+            //
+            // Note the drive is now ready.
+            //
+
+            diskData->DriveNotReady = FALSE;
+
+            //
+            // Output data, and return
+            //
+
+            lengthInformation->Length.QuadPart =
deviceExtension->PartitionLength.QuadPart;
+            status = STATUS_SUCCESS;
+            Irp->IoStatus.Information = sizeof(GET_LENGTH_INFORMATION);
+        }
+
+        break;
+
     default:
 
         //