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sys: ProcessBuffer: improvements

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This commit is contained in:
Bill Zissimopoulos
2017-02-23 17:39:28 -08:00
parent 28f97c2619
commit 7911f1354f
3 changed files with 14 additions and 11 deletions
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7
src/sys/write.c
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@ -50,6 +50,7 @@ enum
RequestAddress = 2,
RequestProcess = 3,
};
FSP_FSCTL_STATIC_ASSERT(RequestCookie == RequestSafeMdl, "");
static NTSTATUS FspFsvolWrite(
PDEVICE_OBJECT FsvolDeviceObject, PIRP Irp, PIO_STACK_LOCATION IrpSp)
@ -453,7 +454,7 @@ NTSTATUS FspFsvolWritePrepare(
Request->Req.Write.Address = (UINT64)(UINT_PTR)Address;
FspIopRequestContext(Request, RequestCookie) = Cookie;
FspIopRequestContext(Request, RequestCookie) = (PVOID)((UINT_PTR)Cookie | 1);
FspIopRequestContext(Request, RequestAddress) = Address;
FspIopRequestContext(Request, RequestProcess) = Process;
@ -571,9 +572,9 @@ static VOID FspFsvolWriteNonCachedRequestFini(FSP_FSCTL_TRANSACT_REQ *Request, P
PIRP Irp = Context[RequestIrp];
if (0 != Irp && FspWriteIrpShouldUseProcessBuffer(Irp, Request->Req.Write.Length))
if ((UINT_PTR)Context[RequestCookie] & 1)
{
PVOID Cookie = Context[RequestCookie];
PVOID Cookie = (PVOID)((UINT_PTR)Context[RequestCookie] & ~1);
PVOID Address = Context[RequestAddress];
PEPROCESS Process = Context[RequestProcess];