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winfsp/src/sys/driver.h
Bill Zissimopoulos 26b4727a0b sys: IRP_MJ_CREATE
2015-12-02 21:05:29 -08:00

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/**
* @file sys/driver.h
*
* @copyright 2015 Bill Zissimopoulos
*/
#ifndef WINFSP_SYS_DRIVER_H_INCLUDED
#define WINFSP_SYS_DRIVER_H_INCLUDED
#define WINFSP_SYS_INTERNAL
#include <ntifs.h>
#include <ntstrsafe.h>
#include <wdmsec.h>
#include <winfsp/fsctl.h>
#define DRIVER_NAME "WinFsp"
/* IoCreateDeviceSecure default SDDL's */
#define FSP_FSCTL_DEVICE_SDDL "D:P(A;;GA;;;SY)(A;;GA;;;BA)(A;;GR;;;WD)"
/* System:GENERIC_ALL, Administrators:GENERIC_ALL, World:GENERIC_READ */
#define FSP_FSVRT_DEVICE_SDDL "D:P(A;;GA;;;SY)(A;;GA;;;BA)(A;;GR;;;WD)"
/* System:GENERIC_ALL, Administrators:GENERIC_ALL, World:GENERIC_READ */
/* DEBUGLOG */
#if DBG
#define DEBUGLOG(fmt, ...) \
DbgPrint("[%d] " DRIVER_NAME "!" __FUNCTION__ ": " fmt "\n", KeGetCurrentIrql(), __VA_ARGS__)
#else
#define DEBUGLOG(fmt, ...) ((void)0)
#endif
/* FSP_ENTER/FSP_LEAVE */
#if DBG
#define FSP_DEBUGLOG_(fmt, rfmt, ...) \
DbgPrint(AbnormalTermination() ? \
"[%d] " DRIVER_NAME "!" __FUNCTION__ "(" fmt ") = *AbnormalTermination*\n" :\
"[%d] " DRIVER_NAME "!" __FUNCTION__ "(" fmt ")" rfmt "\n",\
KeGetCurrentIrql(), __VA_ARGS__)
#define FSP_DEBUGLOG_NOCRIT_(fmt, rfmt, ...)\
DbgPrint( \
"[%d] " DRIVER_NAME "!" __FUNCTION__ "(" fmt ")" rfmt "\n",\
KeGetCurrentIrql(), __VA_ARGS__)
#define FSP_DEBUGBRK_() \
do \
{ \
static int fsp_bp_enabled = 1; \
if (fsp_bp_enabled && HasDbgBreakPoint(__FUNCTION__))\
try { DbgBreakPoint(); } except (EXCEPTION_EXECUTE_HANDLER) {}\
} while (0,0)
#else
#define FSP_DEBUGLOG_(fmt, rfmt, ...) ((void)0)
#define FSP_DEBUGLOG_NOCRIT_(fmt, rfmt, ...)((void)0)
#define FSP_DEBUGBRK_() ((void)0)
#endif
#define FSP_ENTER_(...) \
FSP_DEBUGBRK_(); \
FsRtlEnterFileSystem(); \
try \
{ \
__VA_ARGS__
#define FSP_LEAVE_(...) \
goto fsp_leave_label; \
fsp_leave_label:; \
} \
finally \
{ \
__VA_ARGS__; \
FsRtlExitFileSystem(); \
}
#define FSP_ENTER_NOCRIT_(...) \
FSP_DEBUGBRK_(); \
{ \
__VA_ARGS__
#define FSP_LEAVE_NOCRIT_(...) \
goto fsp_leave_label; \
fsp_leave_label:; \
__VA_ARGS__; \
}
#define FSP_ENTER(...) \
NTSTATUS Result = STATUS_SUCCESS; FSP_ENTER_(__VA_ARGS__)
#define FSP_LEAVE(fmt, ...) \
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);\
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, %s%c, %s%s, " fmt, " = %s[%lld]",\
Irp, \
(const char *)&FspDeviceExtension(IrpSp->DeviceObject)->Kind,\
Irp->RequestorMode == KernelMode ? 'K' : 'U',\
IrpMajorFunctionSym(IrpSp->MajorFunction),\
IrpMinorFunctionSym(IrpSp->MajorFunction, IrpSp->MinorFunction),\
__VA_ARGS__, \
NtStatusSym(Result), \
(LONGLONG)Irp->IoStatus.Information);\
if (STATUS_PENDING == Result) \
{ \
if (0 == (IrpSp->Control & SL_PENDING_RETURNED))\
{ \
/* if the IRP has not been marked pending already */\
ASSERT(FspFsvolDeviceExtensionKind == FspDeviceExtension(DeviceObject)->Kind);\
FSP_FSVOL_DEVICE_EXTENSION *FsvolDeviceExtension =\
FspFsvolDeviceExtension(DeviceObject);\
FSP_FSVRT_DEVICE_EXTENSION *FsvrtDeviceExtension =\
FspFsvrtDeviceExtension(FsvolDeviceExtension->FsvrtDeviceObject);\
if (!FspIoqPostIrp(&FsvrtDeviceExtension->Ioq, Irp))\
{ \
/* this can only happen if the Ioq was stopped */\
ASSERT(FspIoqStopped(&FsvrtDeviceExtension->Ioq));\
FspIopCompleteRequest(Irp, Result = STATUS_CANCELLED);\
} \
} \
} \
else \
FspIopCompleteRequest(Irp, Result);\
); \
return Result
#define FSP_ENTER_IOC(...) \
NTSTATUS Result = STATUS_SUCCESS; \
PIO_STACK_LOCATION IrpSp = IoGetCurrentIrpStackLocation(Irp); (VOID)IrpSp;\
FSP_ENTER_NOCRIT_(__VA_ARGS__)
#define FSP_LEAVE_IOC(fmt, ...) \
FSP_LEAVE_NOCRIT_( \
FSP_DEBUGLOG_NOCRIT_("%p, %s%c, %s%s, " fmt, " = %s[%lld]",\
Irp, \
(const char *)&FspDeviceExtension(IrpSp->DeviceObject)->Kind,\
Irp->RequestorMode == KernelMode ? 'K' : 'U',\
IrpMajorFunctionSym(IrpSp->MajorFunction),\
IrpMinorFunctionSym(IrpSp->MajorFunction, IrpSp->MinorFunction),\
__VA_ARGS__, \
NtStatusSym(Result), \
(LONGLONG)Irp->IoStatus.Information);\
FspIopCompleteRequest(Irp, Result);\
)
#define FSP_ENTER_BOOL(...) \
BOOLEAN Result = TRUE; FSP_ENTER_(__VA_ARGS__)
#define FSP_LEAVE_BOOL(fmt, ...) \
FSP_LEAVE_(FSP_DEBUGLOG_(fmt, " = %s", __VA_ARGS__, Result ? "TRUE" : "FALSE")); return Result
#define FSP_ENTER_VOID(...) \
FSP_ENTER_(__VA_ARGS__)
#define FSP_LEAVE_VOID(fmt, ...) \
FSP_LEAVE_(FSP_DEBUGLOG_(fmt, "", __VA_ARGS__))
#define FSP_RETURN(...) \
do \
{ \
__VA_ARGS__; \
goto fsp_leave_label; \
} while (0,0)
/* misc macros */
#define FSP_TAG ' psF'
#define FSP_IO_INCREMENT IO_NETWORK_INCREMENT
/* disable warnings */
#pragma warning(disable:4100) /* unreferenced formal parameter */
#pragma warning(disable:4200) /* zero-sized array in struct/union */
/* driver major functions */
_Function_class_(DRIVER_DISPATCH)
_IRQL_requires_max_(APC_LEVEL)
/* see https://msdn.microsoft.com/en-us/library/windows/hardware/ff540124(v=vs.85).aspx */
_IRQL_requires_same_
typedef NTSTATUS FSP_DRIVER_DISPATCH(
_In_ struct _DEVICE_OBJECT *DeviceObject, _Inout_ struct _IRP *Irp);
_Dispatch_type_(IRP_MJ_CLEANUP) FSP_DRIVER_DISPATCH FspCleanup;
_Dispatch_type_(IRP_MJ_CLOSE) FSP_DRIVER_DISPATCH FspClose;
_Dispatch_type_(IRP_MJ_CREATE) FSP_DRIVER_DISPATCH FspCreate;
_Dispatch_type_(IRP_MJ_DEVICE_CONTROL) FSP_DRIVER_DISPATCH FspDeviceControl;
_Dispatch_type_(IRP_MJ_DIRECTORY_CONTROL) FSP_DRIVER_DISPATCH FspDirectoryControl;
_Dispatch_type_(IRP_MJ_FILE_SYSTEM_CONTROL) FSP_DRIVER_DISPATCH FspFileSystemControl;
_Dispatch_type_(IRP_MJ_FLUSH_BUFFERS) FSP_DRIVER_DISPATCH FspFlushBuffers;
_Dispatch_type_(IRP_MJ_LOCK_CONTROL) FSP_DRIVER_DISPATCH FspLockControl;
_Dispatch_type_(IRP_MJ_QUERY_EA) FSP_DRIVER_DISPATCH FspQueryEa;
_Dispatch_type_(IRP_MJ_QUERY_INFORMATION) FSP_DRIVER_DISPATCH FspQueryInformation;
_Dispatch_type_(IRP_MJ_QUERY_SECURITY) FSP_DRIVER_DISPATCH FspQuerySecurity;
_Dispatch_type_(IRP_MJ_QUERY_VOLUME_INFORMATION) FSP_DRIVER_DISPATCH FspQueryVolumeInformation;
_Dispatch_type_(IRP_MJ_READ) FSP_DRIVER_DISPATCH FspRead;
_Dispatch_type_(IRP_MJ_SET_EA) FSP_DRIVER_DISPATCH FspSetEa;
_Dispatch_type_(IRP_MJ_SET_INFORMATION) FSP_DRIVER_DISPATCH FspSetInformation;
_Dispatch_type_(IRP_MJ_SET_SECURITY) FSP_DRIVER_DISPATCH FspSetSecurity;
_Dispatch_type_(IRP_MJ_SET_VOLUME_INFORMATION) FSP_DRIVER_DISPATCH FspSetVolumeInformation;
_Dispatch_type_(IRP_MJ_SHUTDOWN) FSP_DRIVER_DISPATCH FspShutdown;
_Dispatch_type_(IRP_MJ_WRITE) FSP_DRIVER_DISPATCH FspWrite;
/* I/O processing functions */
_IRQL_requires_max_(APC_LEVEL)
_IRQL_requires_same_
typedef VOID FSP_IOCMPL_DISPATCH(
_Inout_ PIRP Irp, _In_ const FSP_FSCTL_TRANSACT_RSP *Response);
FSP_IOCMPL_DISPATCH FspCleanupComplete;
FSP_IOCMPL_DISPATCH FspCloseComplete;
FSP_IOCMPL_DISPATCH FspCreateComplete;
FSP_IOCMPL_DISPATCH FspDeviceControlComplete;
FSP_IOCMPL_DISPATCH FspDirectoryControlComplete;
FSP_IOCMPL_DISPATCH FspFileSystemControlComplete;
FSP_IOCMPL_DISPATCH FspFlushBuffersComplete;
FSP_IOCMPL_DISPATCH FspLockControlComplete;
FSP_IOCMPL_DISPATCH FspQueryEaComplete;
FSP_IOCMPL_DISPATCH FspQueryInformationComplete;
FSP_IOCMPL_DISPATCH FspQuerySecurityComplete;
FSP_IOCMPL_DISPATCH FspQueryVolumeInformationComplete;
FSP_IOCMPL_DISPATCH FspReadComplete;
FSP_IOCMPL_DISPATCH FspSetEaComplete;
FSP_IOCMPL_DISPATCH FspSetInformationComplete;
FSP_IOCMPL_DISPATCH FspSetSecurityComplete;
FSP_IOCMPL_DISPATCH FspSetVolumeInformationComplete;
FSP_IOCMPL_DISPATCH FspShutdownComplete;
FSP_IOCMPL_DISPATCH FspWriteComplete;
/* fast I/O */
FAST_IO_CHECK_IF_POSSIBLE FspFastIoCheckIfPossible;
/* resource acquisition */
FAST_IO_ACQUIRE_FILE FspAcquireFileForNtCreateSection;
FAST_IO_RELEASE_FILE FspReleaseFileForNtCreateSection;
FAST_IO_ACQUIRE_FOR_MOD_WRITE FspAcquireForModWrite;
FAST_IO_RELEASE_FOR_MOD_WRITE FspReleaseForModWrite;
FAST_IO_ACQUIRE_FOR_CCFLUSH FspAcquireForCcFlush;
FAST_IO_RELEASE_FOR_CCFLUSH FspReleaseForCcFlush;
/* I/O queue */
typedef struct
{
KSPIN_LOCK SpinLock;
BOOLEAN Stopped;
KEVENT PendingIrpEvent;
LIST_ENTRY PendingIrpList, ProcessIrpList;
IO_CSQ PendingIoCsq, ProcessIoCsq;
} FSP_IOQ;
VOID FspIoqInitialize(FSP_IOQ *Ioq);
VOID FspIoqStop(FSP_IOQ *Ioq);
BOOLEAN FspIoqStopped(FSP_IOQ *Ioq);
BOOLEAN FspIoqPostIrp(FSP_IOQ *Ioq, PIRP Irp);
PIRP FspIoqNextPendingIrp(FSP_IOQ *Ioq, ULONG millis);
BOOLEAN FspIoqStartProcessingIrp(FSP_IOQ *Ioq, PIRP Irp);
PIRP FspIoqEndProcessingIrp(FSP_IOQ *Ioq, UINT_PTR IrpHint);
/* I/O processing */
NTSTATUS FspIopCreateRequest(PIRP Irp, ULONG ExtraSize, FSP_FSCTL_TRANSACT_REQ **PRequest);
VOID FspIopCompleteRequest(PIRP Irp, NTSTATUS Result);
VOID FspIopDispatchComplete(PIRP Irp, const FSP_FSCTL_TRANSACT_RSP *Response);
/* device management */
enum
{
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
{
KSPIN_LOCK SpinLock;
LONG RefCount;
ERESOURCE Resource;
UINT32 Kind;
} FSP_DEVICE_EXTENSION;
typedef struct
{
FSP_DEVICE_EXTENSION Base;
ULONG FsvrtDeviceObjectCount;
} FSP_FSCTL_DEVICE_EXTENSION;
typedef struct
{
FSP_DEVICE_EXTENSION Base;
PDEVICE_OBJECT FsctlDeviceObject;
PDEVICE_OBJECT FsvolDeviceObject;
FSP_FSCTL_VOLUME_PARAMS VolumeParams;
FSP_IOQ Ioq;
PVPB SwapVpb;
BOOLEAN Deleted;
FSP_FSCTL_DECLSPEC_ALIGN UINT8 SecurityDescriptorBuf[];
} FSP_FSVRT_DEVICE_EXTENSION;
typedef struct
{
FSP_DEVICE_EXTENSION Base;
PDEVICE_OBJECT FsvrtDeviceObject;
} FSP_FSVOL_DEVICE_EXTENSION;
static inline
FSP_DEVICE_EXTENSION *FspDeviceExtension(PDEVICE_OBJECT DeviceObject)
{
return DeviceObject->DeviceExtension;
}
static inline
FSP_FSCTL_DEVICE_EXTENSION *FspFsctlDeviceExtension(PDEVICE_OBJECT DeviceObject)
{
ASSERT(FspFsctlDeviceExtensionKind == ((FSP_DEVICE_EXTENSION *)DeviceObject->DeviceExtension)->Kind);
return DeviceObject->DeviceExtension;
}
static inline
FSP_FSVRT_DEVICE_EXTENSION *FspFsvrtDeviceExtension(PDEVICE_OBJECT DeviceObject)
{
ASSERT(FspFsvrtDeviceExtensionKind == ((FSP_DEVICE_EXTENSION *)DeviceObject->DeviceExtension)->Kind);
return DeviceObject->DeviceExtension;
}
static inline
FSP_FSVOL_DEVICE_EXTENSION *FspFsvolDeviceExtension(PDEVICE_OBJECT DeviceObject)
{
ASSERT(FspFsvolDeviceExtensionKind == ((FSP_DEVICE_EXTENSION *)DeviceObject->DeviceExtension)->Kind);
return DeviceObject->DeviceExtension;
}
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);
VOID FspFsctlDeviceVolumeCreated(PDEVICE_OBJECT DeviceObject);
VOID FspFsctlDeviceVolumeDeleted(PDEVICE_OBJECT DeviceObject);
NTSTATUS FspDeviceCopyList(
PDEVICE_OBJECT **PDeviceObjects, PULONG PDeviceObjectCount);
VOID FspDeviceDeleteList(
PDEVICE_OBJECT *DeviceObjects, ULONG DeviceObjectCount);
VOID FspDeviceDeleteAll(VOID);
/* file objects */
typedef struct
{
FAST_MUTEX HeaderFastMutex;
} FSP_FILE_CONTEXT_NONPAGED;
typedef struct
{
FSRTL_ADVANCED_FCB_HEADER Header;
FSP_FILE_CONTEXT_NONPAGED *NonPaged;
UNICODE_STRING FileName;
WCHAR FileNameBuf[];
} FSP_FILE_CONTEXT;
NTSTATUS FspFileContextCreate(ULONG ExtraSize, FSP_FILE_CONTEXT **PContext);
VOID FspFileContextDelete(FSP_FILE_CONTEXT *Context);
/* misc */
NTSTATUS FspCreateGuid(GUID *Guid);
BOOLEAN FspValidRelativeSecurityDescriptor(
PSECURITY_DESCRIPTOR SecurityDescriptor, ULONG SecurityDescriptorLength,
SECURITY_INFORMATION RequiredInformation);
NTSTATUS FspSecuritySubjectContextAccessCheck(
PSECURITY_DESCRIPTOR SecurityDescriptor, ACCESS_MASK DesiredAccess, KPROCESSOR_MODE AccessMode);
/* debug */
#if DBG
BOOLEAN HasDbgBreakPoint(const char *Function);
const char *NtStatusSym(NTSTATUS Status);
const char *IrpMajorFunctionSym(UCHAR MajorFunction);
const char *IrpMinorFunctionSym(UCHAR MajorFunction, UCHAR MinorFunction);
const char *IoctlCodeSym(ULONG ControlCode);
#endif
/* extern */
extern PDRIVER_OBJECT FspDriverObject;
extern PDEVICE_OBJECT FspFsctlDiskDeviceObject;
extern PDEVICE_OBJECT FspFsctlNetDeviceObject;
extern FSP_IOCMPL_DISPATCH *FspIopCompleteFunction[];
#endif
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