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sys: create: FspFsvolCreate

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Replace FspMainFileOpenCheck with inline code
This commit is contained in:
Bill Zissimopoulos 2018-09-06 13:26:53 -07:00
parent a168b96b76
commit 4551766f7a
2 changed files with 26 additions and 24 deletions
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28
src/sys/create.c
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@ -126,8 +126,32 @@ static NTSTATUS FspFsvolCreate(
{
PAGED_CODE();
NTSTATUS Result = STATUS_SUCCESS;
BOOLEAN MainFileOpen = FspMainFileOpenCheck(Irp);
NTSTATUS Result;
PECP_LIST ExtraCreateParameters;
PVOID ExtraCreateParameter;
BOOLEAN MainFileOpen = FALSE;
/*
* Check if the IRP has ECP's.
*
* We do this check for the following reason:
*
* - To determine whether this is a "main file open", i.e. the opening
* of the main file for a stream. In this case this is a reentrant open
* and we should be careful not to try to acquire the rename resource,
* which is already acquired (otherwise DEADLOCK).
*/
ExtraCreateParameters = 0;
Result = FsRtlGetEcpListFromIrp(Irp, &ExtraCreateParameters);
if (NT_SUCCESS(Result) && 0 != ExtraCreateParameters)
{
ExtraCreateParameter = 0;
MainFileOpen =
NT_SUCCESS(FsRtlFindExtraCreateParameter(ExtraCreateParameters,
&FspMainFileOpenEcpGuid, &ExtraCreateParameter, 0)) &&
0 != ExtraCreateParameter &&
!FsRtlIsEcpFromUserMode(ExtraCreateParameter);
}
if (!MainFileOpen)
{

22
src/sys/driver.h
View File

@ -1452,28 +1452,6 @@ NTSTATUS FspMainFileOpen(
NTSTATUS FspMainFileClose(
HANDLE MainFileHandle,
PFILE_OBJECT MainFileObject);
static __forceinline
BOOLEAN FspMainFileOpenCheck(PIRP Irp)
{
extern const GUID FspMainFileOpenEcpGuid;
NTSTATUS Result;
PECP_LIST ExtraCreateParameters = 0;
PVOID ExtraCreateParameter = 0;
Result = FsRtlGetEcpListFromIrp(Irp, &ExtraCreateParameters);
if (!NT_SUCCESS(Result) || 0 == ExtraCreateParameters)
return FALSE;
Result = FsRtlFindExtraCreateParameter(ExtraCreateParameters,
&FspMainFileOpenEcpGuid, &ExtraCreateParameter, 0);
if (!NT_SUCCESS(Result) || 0 == ExtraCreateParameter)
return FALSE;
if (FsRtlIsEcpFromUserMode(ExtraCreateParameter))
return FALSE;
return TRUE;
}
#define FspFileNodeAcquireShared(N,F) FspFileNodeAcquireSharedF(N, FspFileNodeAcquire ## F)
#define FspFileNodeTryAcquireShared(N,F) FspFileNodeTryAcquireSharedF(N, FspFileNodeAcquire ## F, FALSE)
#define FspFileNodeAcquireExclusive(N,F) FspFileNodeAcquireExclusiveF(N, FspFileNodeAcquire ## F)