[NTFS] - In the NtfsAddFilenameToDirectory() function, rename DirectoryContext parame...

[reactos.git] / drivers / filesystems / ntfs / misc.c

diff --git a/drivers/filesystems/ntfs/misc.c b/drivers/filesystems/ntfs/misc.c
index 91593e5..76b7713 100644 (file)
--- a/drivers/filesystems/ntfs/misc.c
+++ b/drivers/filesystems/ntfs/misc.c
@@ -1,6 +1,6 @@
 /*
  *  ReactOS kernel
- *  Copyright (C) 2008 ReactOS Team
+ *  Copyright (C) 2008, 2014 ReactOS Team
  *
  *  This program is free software; you can redistribute it and/or modify
  *  it under the terms of the GNU General Public License as published by
@@ -67,31 +67,35 @@ NtfsAllocateIrpContext(PDEVICE_OBJECT DeviceObject,
                        PIRP Irp)
 {
     PNTFS_IRP_CONTEXT IrpContext;
-    PIO_STACK_LOCATION IoStackLocation;
 
     TRACE_(NTFS, "NtfsAllocateIrpContext()\n");
 
-    IrpContext = (PNTFS_IRP_CONTEXT)ExAllocatePoolWithTag(NonPagedPool,
-                                                          sizeof(NTFS_IRP_CONTEXT),
-                                                          'PRIN');
+    IrpContext = (PNTFS_IRP_CONTEXT)ExAllocateFromNPagedLookasideList(&NtfsGlobalData->IrpContextLookasideList);
     if (IrpContext == NULL)
         return NULL;
 
     RtlZeroMemory(IrpContext, sizeof(NTFS_IRP_CONTEXT));
 
-    IrpContext->Identifier.Type = NTFS_TYPE_IRP_CONTEST;
+    IrpContext->Identifier.Type = NTFS_TYPE_IRP_CONTEXT;
     IrpContext->Identifier.Size = sizeof(NTFS_IRP_CONTEXT);
     IrpContext->Irp = Irp;
     IrpContext->DeviceObject = DeviceObject;
-
-    if (Irp)
+    IrpContext->Stack = IoGetCurrentIrpStackLocation(Irp);
+    IrpContext->MajorFunction = IrpContext->Stack->MajorFunction;
+    IrpContext->MinorFunction = IrpContext->Stack->MinorFunction;
+    IrpContext->FileObject = IrpContext->Stack->FileObject;
+    IrpContext->IsTopLevel = (IoGetTopLevelIrp() == Irp);
+    IrpContext->PriorityBoost = IO_NO_INCREMENT;
+    IrpContext->Flags = IRPCONTEXT_COMPLETE;
+
+    if (IrpContext->MajorFunction == IRP_MJ_FILE_SYSTEM_CONTROL ||
+        IrpContext->MajorFunction == IRP_MJ_DEVICE_CONTROL ||
+        IrpContext->MajorFunction == IRP_MJ_SHUTDOWN ||
+        (IrpContext->MajorFunction != IRP_MJ_CLEANUP &&
+         IrpContext->MajorFunction != IRP_MJ_CLOSE &&
+         IoIsOperationSynchronous(Irp)))
     {
-        IoStackLocation = IoGetCurrentIrpStackLocation(Irp);
-        ASSERT(IoStackLocation);
-
-        IrpContext->MajorFunction = IoStackLocation->MajorFunction;
-        IrpContext->MinorFunction = IoStackLocation->MinorFunction;
-        IrpContext->IsTopLevel = (IoGetTopLevelIrp() == Irp);
+        IrpContext->Flags |= IRPCONTEXT_CANWAIT;
     }
 
     return IrpContext;
@@ -112,4 +116,76 @@ NtfsFileFlagsToAttributes(ULONG NtfsAttributes,
         *FileAttributes = FILE_ATTRIBUTE_NORMAL;
 }
 
+PVOID
+NtfsGetUserBuffer(PIRP Irp,
+                  BOOLEAN Paging)
+{
+    if (Irp->MdlAddress != NULL)
+    {
+        return MmGetSystemAddressForMdlSafe(Irp->MdlAddress, (Paging ? HighPagePriority : NormalPagePriority));
+    }
+    else
+    {
+        return Irp->UserBuffer;
+    }
+}
+
+/**
+* @name NtfsLockUserBuffer
+* @implemented
+*
+* Ensures the IRP has an MDL Address.
+*
+* @param Irp
+* Irp with the UserBuffer that needs locking
+*
+* @param Length
+* Size of the Irp->UserBuffer, in bytes
+*
+* @param Operation
+* What kind of access does the driver need to the buffer. Set to
+* IoReadAccess, IoWriteAccess, or IoModifyAccess.
+*
+* @return
+* STATUS_SUCCESS in case of success, STATUS_INSUFFICIENT_RESOURCES 
+* or an exception code otherwise.
+*
+* @remarks Trevor Thompson shamelessly ripped this from 
+* VfatLockUserBuffer(). Only the name was changed.
+*
+*/
+NTSTATUS
+NtfsLockUserBuffer(IN PIRP Irp,
+                   IN ULONG Length,
+                   IN LOCK_OPERATION Operation)
+{
+    ASSERT(Irp);
+
+    if (Irp->MdlAddress)
+    {
+        return STATUS_SUCCESS;
+    }
+
+    IoAllocateMdl(Irp->UserBuffer, Length, FALSE, FALSE, Irp);
+
+    if (!Irp->MdlAddress)
+    {
+        return STATUS_INSUFFICIENT_RESOURCES;
+    }
+
+    _SEH2_TRY
+    {
+        MmProbeAndLockPages(Irp->MdlAddress, Irp->RequestorMode, Operation);
+    }
+    _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
+    {
+        IoFreeMdl(Irp->MdlAddress);
+        Irp->MdlAddress = NULL;
+        _SEH2_YIELD(return _SEH2_GetExceptionCode());
+    }
+    _SEH2_END;
+
+    return STATUS_SUCCESS;
+}
+
 /* EOF */