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sys: device extension reference count

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This commit is contained in:
Bill Zissimopoulos
2015-11-30 00:35:28 -08:00
parent 7bd979a3fd
commit 7c3d69f63b
5 changed files with 314 additions and 159 deletions
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55
src/sys/driver.h
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@ -80,13 +80,21 @@
FSP_LEAVE_(FSP_DEBUGLOG_(fmt, " = %s", __VA_ARGS__, NtStatusSym(Result))); return Result
#define FSP_ENTER_MJ(...) \
NTSTATUS Result = STATUS_SUCCESS; \
PIO_STACK_LOCATION IrpSp = IoGetCurrentIrpStackLocation(Irp); (VOID)IrpSp;\
FSP_ENTER_(__VA_ARGS__)
PIO_STACK_LOCATION IrpSp = IoGetCurrentIrpStackLocation(Irp);\
FSP_ENTER_(__VA_ARGS__); \
do \
{ \
if (!FspDeviceRetain(IrpSp->DeviceObject))\
{ \
Result = STATUS_CANCELLED; \
goto fsp_leave_label; \
} \
} while (0,0)
#define FSP_LEAVE_MJ(fmt, ...) \
FSP_LEAVE_( \
FSP_DEBUGLOG_("%p, %c%c, %s%s, " fmt, " = %s[%lld]",\
FSP_DEBUGLOG_("%p, %s%c, %s%s, " fmt, " = %s[%lld]",\
Irp, \
FspDeviceExtension(IrpSp->DeviceObject)->Kind,\
(const char *)&FspDeviceExtension(IrpSp->DeviceObject)->Kind,\
Irp->RequestorMode == KernelMode ? 'K' : 'U',\
IrpMajorFunctionSym(IrpSp->MajorFunction),\
IrpMinorFunctionSym(IrpSp->MajorFunction, IrpSp->MajorFunction),\
@ -121,9 +129,9 @@
FSP_ENTER_NOCRIT_(__VA_ARGS__)
#define FSP_LEAVE_IOC(fmt, ...) \
FSP_LEAVE_NOCRIT_( \
FSP_DEBUGLOG_NOCRIT_("%p, %c%c, %s%s, " fmt, " = %s[%lld]",\
FSP_DEBUGLOG_NOCRIT_("%p, %s%c, %s%s, " fmt, " = %s[%lld]",\
Irp, \
FspDeviceExtension(IrpSp->DeviceObject)->Kind,\
(const char *)&FspDeviceExtension(IrpSp->DeviceObject)->Kind,\
Irp->RequestorMode == KernelMode ? 'K' : 'U',\
IrpMajorFunctionSym(IrpSp->MajorFunction),\
IrpMinorFunctionSym(IrpSp->MajorFunction, IrpSp->MajorFunction),\
@ -235,17 +243,19 @@ PIRP FspIoqNextPendingIrp(FSP_IOQ *Ioq, ULONG millis);
BOOLEAN FspIoqStartProcessingIrp(FSP_IOQ *Ioq, PIRP Irp);
PIRP FspIoqEndProcessingIrp(FSP_IOQ *Ioq, UINT_PTR IrpHint);
/* device extensions */
/* device management */
enum
{
FspFsctlDeviceExtensionKind = 'C', /* file system control device (e.g. \Device\WinFsp.Disk) */
FspFsvrtDeviceExtensionKind = 'V', /* virtual volume device (e.g. \Device\Volume{GUID}) */
FspFsvolDeviceExtensionKind = 'F', /* file system volume device (unnamed) */
FspFsctlDeviceExtensionKind = '\0ltC', /* file system control device (e.g. \Device\WinFsp.Disk) */
FspFsvrtDeviceExtensionKind = '\0trV', /* virtual volume device (e.g. \Device\Volume{GUID}) */
FspFsvolDeviceExtensionKind = '\0loV', /* file system volume device (unnamed) */
};
typedef struct
{
UINT8 Kind;
KSPIN_LOCK SpinLock;
LONG RefCount;
ERESOURCE Resource;
UINT32 Kind;
} FSP_DEVICE_EXTENSION;
typedef struct
{
@ -255,6 +265,7 @@ typedef struct
{
FSP_DEVICE_EXTENSION Base;
PDEVICE_OBJECT FsctlDeviceObject;
PDEVICE_OBJECT FsvolDeviceObject;
FSP_FSCTL_VOLUME_PARAMS VolumeParams;
FSP_IOQ Ioq;
PVPB SwapVpb;
@ -288,15 +299,22 @@ FSP_FSVOL_DEVICE_EXTENSION *FspFsvolDeviceExtension(PDEVICE_OBJECT DeviceObject)
ASSERT(FspFsvolDeviceExtensionKind == ((FSP_DEVICE_EXTENSION *)DeviceObject->DeviceExtension)->Kind);
return DeviceObject->DeviceExtension;
}
NTSTATUS FspDeviceCreateList(
PDRIVER_OBJECT DriverObject, PDEVICE_OBJECT **PDeviceObjects, PULONG PDeviceObjectCount);
NTSTATUS FspDeviceCreateSecure(UINT32 Kind, ULONG ExtraSize,
PUNICODE_STRING DeviceName, DEVICE_TYPE DeviceType,
PUNICODE_STRING DeviceSddl, LPCGUID DeviceClassGuid,
PDEVICE_OBJECT *PDeviceObject);
NTSTATUS FspDeviceCreate(UINT32 Kind, ULONG ExtraSize,
DEVICE_TYPE DeviceType,
PDEVICE_OBJECT *PDeviceObject);
VOID FspDeviceDelete(PDEVICE_OBJECT DeviceObject);
BOOLEAN FspDeviceRetain(PDEVICE_OBJECT DeviceObject);
VOID FspDeviceRelease(PDEVICE_OBJECT DeviceObject);
NTSTATUS FspDeviceCopyList(
PDEVICE_OBJECT **PDeviceObjects, PULONG PDeviceObjectCount);
VOID FspDeviceDeleteList(
PDEVICE_OBJECT *DeviceObjects, ULONG DeviceObjectCount);
NTSTATUS FspDeviceOwned(
PDRIVER_OBJECT DriverObject, PDEVICE_OBJECT DeviceObject);
VOID FspDeviceInitExtension(PDEVICE_OBJECT DeviceObject, UINT8 Kind);
VOID FspDeviceDeleteObject(PDEVICE_OBJECT DeviceObject);
VOID FspDeviceDeleteObjects(PDRIVER_OBJECT DriverObject);
NTSTATUS FspDeviceOwned(PDEVICE_OBJECT DeviceObject);
VOID FspDeviceDeleteAll(VOID);
/* I/O processing */
VOID FspIopCompleteRequest(PIRP Irp, NTSTATUS Result);
@ -317,6 +335,7 @@ const char *IoctlCodeSym(ULONG ControlCode);
#endif
/* extern */
extern PDRIVER_OBJECT FspDriverObject;
extern PDEVICE_OBJECT FspFsctlDiskDeviceObject;
extern PDEVICE_OBJECT FspFsctlNetDeviceObject;
extern FSP_IOCMPL_DISPATCH *FspIopCompleteFunction[];