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Implemented VfatGetUserBuffer and VfatLockUserBuffer.

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svn path=/trunk/; revision=2913
This commit is contained in:
Hartmut Birr 2002-05-05 20:19:45 +00:00
parent cc92156f65
commit 2ca90e6988
1 changed files with 35 additions and 1 deletions
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36
reactos/drivers/fs/vfat/misc.c
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@ -1,4 +1,4 @@
/* $Id: misc.c,v 1.1 2001/11/02 22:44:34 hbirr Exp $ /* $Id: misc.c,v 1.2 2002/05/05 20:19:45 hbirr Exp $
* *
* COPYRIGHT: See COPYING in the top level directory * COPYRIGHT: See COPYING in the top level directory
* PROJECT: ReactOS kernel * PROJECT: ReactOS kernel
@ -205,5 +205,39 @@ NTSTATUS VfatQueueRequest(PVFAT_IRP_CONTEXT IrpContext)
return STATUS_PENDING; return STATUS_PENDING;
} }
PVOID VfatGetUserBuffer(IN PIRP Irp)
{
assert(Irp);
if (Irp->MdlAddress)
{
return MmGetSystemAddressForMdl(Irp->MdlAddress);
}
else
{
return Irp->UserBuffer;
}
}
NTSTATUS VfatLockUserBuffer(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;
}
MmProbeAndLockPages(Irp->MdlAddress, Irp->RequestorMode, Operation);
return STATUS_SUCCESS;
}