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sys: FspFsvolDeviceLookupContext

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This commit is contained in:
Bill Zissimopoulos 2015-12-04 16:17:06 -08:00
parent 3dee2eaf75
commit c87b8c948a
2 changed files with 27 additions and 8 deletions
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34
src/sys/device.c
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@ -24,6 +24,7 @@ BOOLEAN FspDeviceRetain(PDEVICE_OBJECT DeviceObject);
VOID FspDeviceRelease(PDEVICE_OBJECT DeviceObject); VOID FspDeviceRelease(PDEVICE_OBJECT DeviceObject);
VOID FspFsctlDeviceVolumeCreated(PDEVICE_OBJECT DeviceObject); VOID FspFsctlDeviceVolumeCreated(PDEVICE_OBJECT DeviceObject);
VOID FspFsctlDeviceVolumeDeleted(PDEVICE_OBJECT DeviceObject); VOID FspFsctlDeviceVolumeDeleted(PDEVICE_OBJECT DeviceObject);
PVOID FspFsvolDeviceLookupContext(PDEVICE_OBJECT DeviceObject, UINT64 Identifier);
NTSTATUS FspFsvolDeviceInsertContext(PDEVICE_OBJECT DeviceObject, UINT64 Identifier, PVOID Context, NTSTATUS FspFsvolDeviceInsertContext(PDEVICE_OBJECT DeviceObject, UINT64 Identifier, PVOID Context,
PBOOLEAN PInserted); PBOOLEAN PInserted);
VOID FspFsvolDeviceDeleteContext(PDEVICE_OBJECT DeviceObject, UINT64 Identifier, VOID FspFsvolDeviceDeleteContext(PDEVICE_OBJECT DeviceObject, UINT64 Identifier,
@ -304,10 +305,26 @@ VOID FspFsctlDeviceVolumeDeleted(PDEVICE_OBJECT DeviceObject)
IoUnregisterFileSystem(DeviceObject); IoUnregisterFileSystem(DeviceObject);
} }
PVOID FspFsvolDeviceLookupContext(PDEVICE_OBJECT DeviceObject, UINT64 Identifier)
{
// !PAGED_CODE(); /* because of fast mutex use in GenericTable */
FSP_FSVOL_DEVICE_EXTENSION *FsvolDeviceExtension = FspFsvolDeviceExtension(DeviceObject);
ASSERT(FspFsvolDeviceExtensionKind == FsvolDeviceExtension->Base.Kind);
PVOID Result;
ExAcquireFastMutex(&FsvolDeviceExtension->GenericTableFastMutex);
Result = RtlLookupElementGenericTableAvl(&FsvolDeviceExtension->GenericTable, &Identifier);
ExReleaseFastMutex(&FsvolDeviceExtension->GenericTableFastMutex);
return Result;
}
NTSTATUS FspFsvolDeviceInsertContext(PDEVICE_OBJECT DeviceObject, UINT64 Identifier, PVOID Context, NTSTATUS FspFsvolDeviceInsertContext(PDEVICE_OBJECT DeviceObject, UINT64 Identifier, PVOID Context,
PBOOLEAN PInserted) PBOOLEAN PInserted)
{ {
// !PAGED_CODE(); // !PAGED_CODE(); /* because of fast mutex use in GenericTable */
FSP_FSVOL_DEVICE_EXTENSION *FsvolDeviceExtension = FspFsvolDeviceExtension(DeviceObject); FSP_FSVOL_DEVICE_EXTENSION *FsvolDeviceExtension = FspFsvolDeviceExtension(DeviceObject);
ASSERT(FspFsvolDeviceExtensionKind == FsvolDeviceExtension->Base.Kind); ASSERT(FspFsvolDeviceExtensionKind == FsvolDeviceExtension->Base.Kind);
@ -328,14 +345,15 @@ NTSTATUS FspFsvolDeviceInsertContext(PDEVICE_OBJECT DeviceObject, UINT64 Identif
VOID FspFsvolDeviceDeleteContext(PDEVICE_OBJECT DeviceObject, UINT64 Identifier, VOID FspFsvolDeviceDeleteContext(PDEVICE_OBJECT DeviceObject, UINT64 Identifier,
PBOOLEAN PDeleted) PBOOLEAN PDeleted)
{ {
// !PAGED_CODE(); // !PAGED_CODE(); /* because of fast mutex use in GenericTable */
FSP_FSVOL_DEVICE_EXTENSION *FsvolDeviceExtension = FspFsvolDeviceExtension(DeviceObject); FSP_FSVOL_DEVICE_EXTENSION *FsvolDeviceExtension = FspFsvolDeviceExtension(DeviceObject);
ASSERT(FspFsvolDeviceExtensionKind == FsvolDeviceExtension->Base.Kind); ASSERT(FspFsvolDeviceExtensionKind == FsvolDeviceExtension->Base.Kind);
BOOLEAN Deleted;
ExAcquireFastMutex(&FsvolDeviceExtension->GenericTableFastMutex); ExAcquireFastMutex(&FsvolDeviceExtension->GenericTableFastMutex);
BOOLEAN Deleted = RtlDeleteElementGenericTableAvl(&FsvolDeviceExtension->GenericTable, Deleted = RtlDeleteElementGenericTableAvl(&FsvolDeviceExtension->GenericTable, &Identifier);
&Identifier);
ExReleaseFastMutex(&FsvolDeviceExtension->GenericTableFastMutex); ExReleaseFastMutex(&FsvolDeviceExtension->GenericTableFastMutex);
if (0 != PDeleted) if (0 != PDeleted)
@ -345,7 +363,7 @@ VOID FspFsvolDeviceDeleteContext(PDEVICE_OBJECT DeviceObject, UINT64 Identifier,
static RTL_GENERIC_COMPARE_RESULTS NTAPI FspFsvolDeviceCompareElement( static RTL_GENERIC_COMPARE_RESULTS NTAPI FspFsvolDeviceCompareElement(
PRTL_AVL_TABLE Table, PVOID FirstElement, PVOID SecondElement) PRTL_AVL_TABLE Table, PVOID FirstElement, PVOID SecondElement)
{ {
// !PAGED_CODE(); // !PAGED_CODE(); /* because of fast mutex use in GenericTable */
if (FirstElement < SecondElement) if (FirstElement < SecondElement)
return GenericLessThan; return GenericLessThan;
@ -359,16 +377,16 @@ static RTL_GENERIC_COMPARE_RESULTS NTAPI FspFsvolDeviceCompareElement(
static PVOID NTAPI FspFsvolDeviceAllocateElement( static PVOID NTAPI FspFsvolDeviceAllocateElement(
PRTL_AVL_TABLE Table, CLONG ByteSize) PRTL_AVL_TABLE Table, CLONG ByteSize)
{ {
// !PAGED_CODE(); // !PAGED_CODE(); /* because of fast mutex use in GenericTable */
/* allocate from non-paged pool because of fast mutex use in GenericTable */ /* allocate from non-paged pool because of fast mutex use */
return ExAllocatePoolWithTag(NonPagedPool, ByteSize, FSP_TAG); return ExAllocatePoolWithTag(NonPagedPool, ByteSize, FSP_TAG);
} }
static VOID NTAPI FspFsvolDeviceFreeElement( static VOID NTAPI FspFsvolDeviceFreeElement(
PRTL_AVL_TABLE Table, PVOID Buffer) PRTL_AVL_TABLE Table, PVOID Buffer)
{ {
// !PAGED_CODE(); // !PAGED_CODE(); /* because of fast mutex use in GenericTable */
ExFreePoolWithTag(Buffer, FSP_TAG); ExFreePoolWithTag(Buffer, FSP_TAG);
} }

1
src/sys/driver.h
View File

@ -341,6 +341,7 @@ BOOLEAN FspDeviceRetain(PDEVICE_OBJECT DeviceObject);
VOID FspDeviceRelease(PDEVICE_OBJECT DeviceObject); VOID FspDeviceRelease(PDEVICE_OBJECT DeviceObject);
VOID FspFsctlDeviceVolumeCreated(PDEVICE_OBJECT DeviceObject); VOID FspFsctlDeviceVolumeCreated(PDEVICE_OBJECT DeviceObject);
VOID FspFsctlDeviceVolumeDeleted(PDEVICE_OBJECT DeviceObject); VOID FspFsctlDeviceVolumeDeleted(PDEVICE_OBJECT DeviceObject);
PVOID FspFsvolDeviceLookupContext(PDEVICE_OBJECT DeviceObject, UINT64 Identifier);
NTSTATUS FspFsvolDeviceInsertContext(PDEVICE_OBJECT DeviceObject, UINT64 Identifier, PVOID Context, NTSTATUS FspFsvolDeviceInsertContext(PDEVICE_OBJECT DeviceObject, UINT64 Identifier, PVOID Context,
PBOOLEAN PInserted); PBOOLEAN PInserted);
VOID FspFsvolDeviceDeleteContext(PDEVICE_OBJECT DeviceObject, UINT64 Identifier, VOID FspFsvolDeviceDeleteContext(PDEVICE_OBJECT DeviceObject, UINT64 Identifier,