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sys: avoid using FspFsextProvider unnecessarily

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This commit is contained in:
Bill Zissimopoulos 2019-11-04 16:30:30 -08:00
parent 5110b3c5a1
commit 254174b8e9
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GPG Key ID: 3D4F95D52C7B3EA3
4 changed files with 11 additions and 31 deletions
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16
src/sys/device.c
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@ -340,6 +340,7 @@ static NTSTATUS FspFsvolDeviceInit(PDEVICE_OBJECT DeviceObject)
Result = Provider->DeviceInit(DeviceObject, &FsvolDeviceExtension->VolumeParams);
if (!NT_SUCCESS(Result))
return Result;
FsvolDeviceExtension->Provider = Provider;
FsvolDeviceExtension->InitDoneFsext = 1;
}
else
@ -525,10 +526,8 @@ static VOID FspFsvolDeviceFini(PDEVICE_OBJECT DeviceObject)
/* finalize any fsext provider */
if (FsvolDeviceExtension->InitDoneFsext)
{
FSP_FSEXT_PROVIDER *Provider = FspFsextProvider(
FsvolDeviceExtension->VolumeParams.FsextControlCode, 0);
if (0 != Provider)
Provider->DeviceFini(DeviceObject);
if (0 != FsvolDeviceExtension->Provider)
FsvolDeviceExtension->Provider->DeviceFini(DeviceObject);
}
}
@ -577,13 +576,8 @@ static VOID FspFsvolDeviceExpirationRoutine(PVOID Context)
FspMetaCacheInvalidateExpired(FsvolDeviceExtension->DirInfoCache, InterruptTime);
FspMetaCacheInvalidateExpired(FsvolDeviceExtension->StreamInfoCache, InterruptTime);
/* run any fsext provider expiration routine */
if (0 != FsvolDeviceExtension->VolumeParams.FsextControlCode)
{
FSP_FSEXT_PROVIDER *Provider = FspFsextProvider(
FsvolDeviceExtension->VolumeParams.FsextControlCode, 0);
if (0 != Provider)
Provider->DeviceExpirationRoutine(DeviceObject, InterruptTime);
}
if (0 != FsvolDeviceExtension->Provider)
FsvolDeviceExtension->Provider->DeviceExpirationRoutine(DeviceObject, InterruptTime);
FspIoqRemoveExpired(FsvolDeviceExtension->Ioq, InterruptTime);
KeAcquireSpinLock(&FsvolDeviceExtension->ExpirationLock, &Irql);

1
src/sys/driver.h
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@ -1079,6 +1079,7 @@ typedef struct
PVPB SwapVpb;
FSP_DELAYED_WORK_ITEM DeleteVolumeDelayedWorkItem;
FSP_FSCTL_VOLUME_PARAMS VolumeParams;
FSP_FSEXT_PROVIDER *Provider;
UNICODE_STRING VolumePrefix;
UNICODE_PREFIX_TABLE_ENTRY VolumePrefixEntry;
FSP_IOQ *Ioq;

16
src/sys/fsext.c
View File

@ -28,7 +28,7 @@
* the data structure used to store providers (currently 2 parallel
* arrays) must be revisited.
*/
#define FSP_FSEXT_PROVIDER_COUNTMAX 4
#define FSP_FSEXT_PROVIDER_COUNTMAX 16
static KSPIN_LOCK FsextSpinLock = 0;
static UINT32 FsextControlCodes[FSP_FSEXT_PROVIDER_COUNTMAX];
@ -37,23 +37,9 @@ static FSP_FSEXT_PROVIDER *FsextProviders[FSP_FSEXT_PROVIDER_COUNTMAX];
static inline
FSP_FSEXT_PROVIDER *FspFsextProviderGet(UINT32 FsextControlCode)
{
#if 0
for (ULONG I = 0; FSP_FSEXT_PROVIDER_COUNTMAX > I; I++)
if (FsextControlCode == FsextControlCodes[I])
return FsextProviders[I];
#else
/* unroll by hand */
FSP_FSCTL_STATIC_ASSERT(4 == FSP_FSEXT_PROVIDER_COUNTMAX,
"unrolled loop expects FsextProviders to have 4 elements");
if (FsextControlCode == FsextControlCodes[0])
return FsextProviders[0];
if (FsextControlCode == FsextControlCodes[1])
return FsextProviders[1];
if (FsextControlCode == FsextControlCodes[2])
return FsextProviders[2];
if (FsextControlCode == FsextControlCodes[3])
return FsextProviders[3];
#endif
return 0;
}

9
src/sys/volume.c
View File

@ -992,14 +992,13 @@ NTSTATUS FspVolumeTransactFsext(
if (!FspDeviceReference(FsvolDeviceObject))
return STATUS_CANCELLED;
FSP_FSVOL_DEVICE_EXTENSION *FsvolDeviceExtension = FspFsvolDeviceExtension(FsvolDeviceObject);
NTSTATUS Result = STATUS_INVALID_DEVICE_REQUEST;
if (IrpSp->Parameters.FileSystemControl.FsControlCode ==
FspFsvolDeviceExtension(FsvolDeviceObject)->VolumeParams.FsextControlCode)
FsvolDeviceExtension->VolumeParams.FsextControlCode)
{
FSP_FSEXT_PROVIDER *Provider = FspFsextProvider(
IrpSp->Parameters.FileSystemControl.FsControlCode, 0);
if (0 != Provider)
Result = Provider->DeviceTransact(FsvolDeviceObject, Irp);
if (0 != FsvolDeviceExtension->Provider)
Result = FsvolDeviceExtension->Provider->DeviceTransact(FsvolDeviceObject, Irp);
}
FspDeviceDereference(FsvolDeviceObject);