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fsctl: FSP_FSCTL_VOLUME_PARAMS

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This commit is contained in:
Bill Zissimopoulos
2016-01-25 12:02:52 -08:00
parent ed91c26c59
commit 1c464cad2b
5 changed files with 124 additions and 20 deletions
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67
src/sys/device.c
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@ -35,6 +35,9 @@ VOID FspFsvolDeviceDeleteContext(PDEVICE_OBJECT DeviceObject, UINT64 Identifier,
static RTL_AVL_COMPARE_ROUTINE FspFsvolDeviceCompareElement;
static RTL_AVL_ALLOCATE_ROUTINE FspFsvolDeviceAllocateElement;
static RTL_AVL_FREE_ROUTINE FspFsvolDeviceFreeElement;
VOID FspFsvolGetVolumeInfo(PDEVICE_OBJECT DeviceObject, FSP_FSCTL_VOLUME_INFO *VolumeInfo);
BOOLEAN FspFsvolTryGetVolumeInfo(PDEVICE_OBJECT DeviceObject, FSP_FSCTL_VOLUME_INFO *VolumeInfo);
VOID FspFsvolSetVolumeInfo(PDEVICE_OBJECT DeviceObject, const FSP_FSCTL_VOLUME_INFO *VolumeInfo);
NTSTATUS FspDeviceCopyList(
PDEVICE_OBJECT **PDeviceObjects, PULONG PDeviceObjectCount);
VOID FspDeviceDeleteList(
@ -307,6 +310,10 @@ static NTSTATUS FspFsvolDeviceInit(PDEVICE_OBJECT DeviceObject)
IoStartTimer(DeviceObject);
FsvolDeviceExtension->InitDoneTimer = 1;
/* initialize the volume information */
KeInitializeSpinLock(&FsvolDeviceExtension->InfoSpinLock);
FsvolDeviceExtension->InitDoneInfo = 1;
return STATUS_SUCCESS;
}
@ -509,6 +516,66 @@ static VOID NTAPI FspFsvolDeviceFreeElement(
PAGED_CODE();
}
VOID FspFsvolGetVolumeInfo(PDEVICE_OBJECT DeviceObject, FSP_FSCTL_VOLUME_INFO *VolumeInfo)
{
// !PAGED_CODE();
FSP_FSVOL_DEVICE_EXTENSION *FsvolDeviceExtension = FspFsvolDeviceExtension(DeviceObject);
FSP_FSCTL_VOLUME_INFO VolumeInfoNp;
KIRQL Irql;
KeAcquireSpinLock(&FsvolDeviceExtension->InfoSpinLock, &Irql);
VolumeInfoNp = FsvolDeviceExtension->VolumeInfo;
KeReleaseSpinLock(&FsvolDeviceExtension->InfoSpinLock, Irql);
*VolumeInfo = VolumeInfoNp;
}
#pragma warning(push)
#pragma warning(disable:4701) /* disable idiotic warning! */
BOOLEAN FspFsvolTryGetVolumeInfo(PDEVICE_OBJECT DeviceObject, FSP_FSCTL_VOLUME_INFO *VolumeInfo)
{
// !PAGED_CODE();
FSP_FSVOL_DEVICE_EXTENSION *FsvolDeviceExtension = FspFsvolDeviceExtension(DeviceObject);
FSP_FSCTL_VOLUME_INFO VolumeInfoNp;
KIRQL Irql;
BOOLEAN Result;
KeAcquireSpinLock(&FsvolDeviceExtension->InfoSpinLock, &Irql);
if (0 < FsvolDeviceExtension->InfoExpirationTime &&
KeQueryInterruptTime() < FsvolDeviceExtension->InfoExpirationTime)
{
VolumeInfoNp = FsvolDeviceExtension->VolumeInfo;
Result = TRUE;
}
else
Result = FALSE;
KeReleaseSpinLock(&FsvolDeviceExtension->InfoSpinLock, Irql);
if (Result)
*VolumeInfo = VolumeInfoNp;
return Result;
}
#pragma warning(pop)
VOID FspFsvolSetVolumeInfo(PDEVICE_OBJECT DeviceObject, const FSP_FSCTL_VOLUME_INFO *VolumeInfo)
{
// !PAGED_CODE();
FSP_FSVOL_DEVICE_EXTENSION *FsvolDeviceExtension = FspFsvolDeviceExtension(DeviceObject);
FSP_FSCTL_VOLUME_INFO VolumeInfoNp = *VolumeInfo;
KIRQL Irql;
UINT64 FileInfoTimeout = FsvolDeviceExtension->VolumeParams.FileInfoTimeout * 10000ULL;
KeAcquireSpinLock(&FsvolDeviceExtension->InfoSpinLock, &Irql);
FsvolDeviceExtension->VolumeInfo = VolumeInfoNp;
FsvolDeviceExtension->InfoExpirationTime = 0 != FileInfoTimeout ?
KeQueryInterruptTime() + FileInfoTimeout : 0;
KeReleaseSpinLock(&FsvolDeviceExtension->InfoSpinLock, Irql);
}
NTSTATUS FspDeviceCopyList(
PDEVICE_OBJECT **PDeviceObjects, PULONG PDeviceObjectCount)
{