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sys: FspLockUserBuffer: now acts directly on the IRP

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This commit is contained in:
Bill Zissimopoulos
2016-03-18 15:36:44 -07:00
parent 3d6397871d
commit 57460d7452
5 changed files with 20 additions and 30 deletions
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16
src/sys/util.c
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@ -14,8 +14,7 @@ NTSTATUS FspSendSetInformationIrp(PDEVICE_OBJECT DeviceObject, PFILE_OBJECT File
static NTSTATUS FspSendSetInformationIrpCompletion(
PDEVICE_OBJECT DeviceObject, PIRP Irp, PVOID Context0);
NTSTATUS FspBufferUserBuffer(PIRP Irp, ULONG Length, LOCK_OPERATION Operation);
NTSTATUS FspLockUserBuffer(PVOID UserBuffer, ULONG Length,
KPROCESSOR_MODE RequestorMode, LOCK_OPERATION Operation, PMDL *PMdl);
NTSTATUS FspLockUserBuffer(PIRP Irp, ULONG Length, LOCK_OPERATION Operation);
NTSTATUS FspMapLockedPagesInUserMode(PMDL Mdl, PVOID *PAddress);
NTSTATUS FspCcInitializeCacheMap(PFILE_OBJECT FileObject, PCC_FILE_SIZES FileSizes,
BOOLEAN PinAccess, PCACHE_MANAGER_CALLBACKS Callbacks, PVOID CallbackContext);
@ -285,20 +284,20 @@ NTSTATUS FspBufferUserBuffer(PIRP Irp, ULONG Length, LOCK_OPERATION Operation)
return STATUS_SUCCESS;
}
NTSTATUS FspLockUserBuffer(PVOID UserBuffer, ULONG Length,
KPROCESSOR_MODE RequestorMode, LOCK_OPERATION Operation, PMDL *PMdl)
NTSTATUS FspLockUserBuffer(PIRP Irp, ULONG Length, LOCK_OPERATION Operation)
{
PAGED_CODE();
*PMdl = 0;
if (0 == Length || 0 != Irp->MdlAddress)
return STATUS_SUCCESS;
PMDL Mdl = IoAllocateMdl(UserBuffer, Length, FALSE, FALSE, 0);
PMDL Mdl = IoAllocateMdl(Irp->UserBuffer, Length, FALSE, FALSE, 0);
if (0 == Mdl)
return STATUS_INSUFFICIENT_RESOURCES;
try
{
MmProbeAndLockPages(Mdl, RequestorMode, Operation);
MmProbeAndLockPages(Mdl, Irp->RequestorMode, Operation);
}
except (EXCEPTION_EXECUTE_HANDLER)
{
@ -306,7 +305,8 @@ NTSTATUS FspLockUserBuffer(PVOID UserBuffer, ULONG Length,
return GetExceptionCode();
}
*PMdl = Mdl;
Irp->MdlAddress = Mdl;
return STATUS_SUCCESS;
}