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dll: overwrite refactoring

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This commit is contained in:
Bill Zissimopoulos
2016-01-12 15:14:31 -08:00
parent 39847b7181
commit 3c80e25614
5 changed files with 164 additions and 130 deletions
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147
inc/winfsp/winfsp.h
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@ -21,6 +21,139 @@
#include <winfsp/fsctl.h>
/*
* File System
*/
typedef struct _FSP_FILE_SYSTEM FSP_FILE_SYSTEM;
typedef VOID FSP_FILE_SYSTEM_DISPATCHER(FSP_FILE_SYSTEM *, FSP_FSCTL_TRANSACT_REQ *);
typedef NTSTATUS FSP_FILE_SYSTEM_OPERATION(FSP_FILE_SYSTEM *, FSP_FSCTL_TRANSACT_REQ *);
typedef struct _FSP_FILE_SYSTEM_INTERFACE
{
NTSTATUS (*GetSecurity)(FSP_FILE_SYSTEM *FileSystem,
PWSTR FileName, PDWORD PFileAttributes,
PSECURITY_DESCRIPTOR SecurityDescriptor, SIZE_T *PSecurityDescriptorSize);
#if 0
NTSTATUS (*Create)(FSP_FILE_SYSTEM *FileSystem,
FSP_FSCTL_TRANSACT_REQ *Request, FSP_FILE_NODE **PFileNode);
NTSTATUS (*Open)(FSP_FILE_SYSTEM *FileSystem,
FSP_FSCTL_TRANSACT_REQ *Request, FSP_FILE_NODE **PFileNode);
NTSTATUS (*Overwrite)(FSP_FILE_SYSTEM *FileSystem,
FSP_FSCTL_TRANSACT_REQ *Request, BOOLEAN ReplaceFileAttributes, FSP_FILE_NODE *FileNode);
VOID (*Cleanup)(FSP_FILE_SYSTEM *FileSystem,
FSP_FSCTL_TRANSACT_REQ *Request, FSP_FILE_NODE *FileNode, BOOLEAN Delete);
VOID (*Close)(FSP_FILE_SYSTEM *FileSystem,
FSP_FSCTL_TRANSACT_REQ *Request, FSP_FILE_NODE *FileNode);
#endif
} FSP_FILE_SYSTEM_INTERFACE;
typedef struct _FSP_FILE_SYSTEM
{
UINT16 Version;
WCHAR VolumePath[FSP_FSCTL_VOLUME_NAME_SIZEMAX / sizeof(WCHAR)];
HANDLE VolumeHandle;
PVOID UserContext;
NTSTATUS DispatcherResult;
FSP_FILE_SYSTEM_DISPATCHER *Dispatcher;
FSP_FILE_SYSTEM_DISPATCHER *EnterOperation, *LeaveOperation;
FSP_FILE_SYSTEM_OPERATION *Operations[FspFsctlTransactKindCount];
const FSP_FILE_SYSTEM_INTERFACE *Interface;
} FSP_FILE_SYSTEM;
FSP_API NTSTATUS FspFileSystemCreate(PWSTR DevicePath,
const FSP_FSCTL_VOLUME_PARAMS *VolumeParams,
const FSP_FILE_SYSTEM_INTERFACE *Interface,
FSP_FILE_SYSTEM **PFileSystem);
FSP_API VOID FspFileSystemDelete(FSP_FILE_SYSTEM *FileSystem);
FSP_API NTSTATUS FspFileSystemLoop(FSP_FILE_SYSTEM *FileSystem);
FSP_API VOID FspFileSystemDirectDispatcher(FSP_FILE_SYSTEM *FileSystem,
FSP_FSCTL_TRANSACT_REQ *Request);
FSP_API VOID FspFileSystemPoolDispatcher(FSP_FILE_SYSTEM *FileSystem,
FSP_FSCTL_TRANSACT_REQ *Request);
static inline
VOID FspFileSystemSetDispatcher(FSP_FILE_SYSTEM *FileSystem,
FSP_FILE_SYSTEM_DISPATCHER *Dispatcher,
FSP_FILE_SYSTEM_DISPATCHER *EnterOperation,
FSP_FILE_SYSTEM_DISPATCHER *LeaveOperation)
{
FileSystem->Dispatcher = Dispatcher;
FileSystem->EnterOperation = EnterOperation;
FileSystem->LeaveOperation = LeaveOperation;
}
static inline
VOID FspFileSystemSetOperation(FSP_FILE_SYSTEM *FileSystem,
ULONG Index,
FSP_FILE_SYSTEM_OPERATION *Operation)
{
FileSystem->Operations[Index] = Operation;
}
static inline
VOID FspFileSystemGetDispatcherResult(FSP_FILE_SYSTEM *FileSystem,
NTSTATUS *PDispatcherResult)
{
/* 32-bit reads are atomic */
*PDispatcherResult = FileSystem->DispatcherResult;
MemoryBarrier();
}
static inline
VOID FspFileSystemSetDispatcherResult(FSP_FILE_SYSTEM *FileSystem,
NTSTATUS DispatcherResult)
{
if (NT_SUCCESS(DispatcherResult))
return;
InterlockedCompareExchange(&FileSystem->DispatcherResult, DispatcherResult, 0);
}
static inline
VOID FspFileSystemEnterOperation(FSP_FILE_SYSTEM *FileSystem,
FSP_FSCTL_TRANSACT_REQ *Request)
{
if (0 != FileSystem->EnterOperation)
FileSystem->EnterOperation(FileSystem, Request);
}
static inline
VOID FspFileSystemLeaveOperation(FSP_FILE_SYSTEM *FileSystem,
FSP_FSCTL_TRANSACT_REQ *Request)
{
if (0 != FileSystem->LeaveOperation)
FileSystem->LeaveOperation(FileSystem, Request);
}
FSP_API NTSTATUS FspFileSystemSendResponse(FSP_FILE_SYSTEM *FileSystem,
FSP_FSCTL_TRANSACT_RSP *Response);
FSP_API NTSTATUS FspFileSystemSendResponseWithStatus(FSP_FILE_SYSTEM *FileSystem,
FSP_FSCTL_TRANSACT_REQ *Request, NTSTATUS Result);
/*
* File System Operations
*/
FSP_API PGENERIC_MAPPING FspGetFileGenericMapping(VOID);
FSP_API NTSTATUS FspAccessCheck(FSP_FILE_SYSTEM *FileSystem,
FSP_FSCTL_TRANSACT_REQ *Request, BOOLEAN CheckParentDirectory, BOOLEAN AllowTraverseCheck,
DWORD DesiredAccess, PDWORD PGrantedAccess);
FSP_API NTSTATUS FspFileSystemOpCreate(FSP_FILE_SYSTEM *FileSystem,
FSP_FSCTL_TRANSACT_REQ *Request);
FSP_API NTSTATUS FspFileSystemOpOverwrite(FSP_FILE_SYSTEM *FileSystem,
FSP_FSCTL_TRANSACT_REQ *Request);
FSP_API NTSTATUS FspFileSystemOpCleanup(FSP_FILE_SYSTEM *FileSystem,
FSP_FSCTL_TRANSACT_REQ *Request);
FSP_API NTSTATUS FspFileSystemOpClose(FSP_FILE_SYSTEM *FileSystem,
FSP_FSCTL_TRANSACT_REQ *Request);
/*
* Path Handling
*/
FSP_API VOID FspPathPrefix(PWSTR Path, PWSTR *PPrefix, PWSTR *PRemain);
FSP_API VOID FspPathSuffix(PWSTR Path, PWSTR *PRemain, PWSTR *PSuffix);
FSP_API VOID FspPathCombine(PWSTR Prefix, PWSTR Suffix);
/*
* Utility
*/
FSP_API NTSTATUS FspNtStatusFromWin32(DWORD Error);
FSP_API VOID FspDebugLog(const char *format, ...);
#if 0
/*
* File Nodes
*/
@ -218,18 +351,6 @@ FSP_API NTSTATUS FspFileSystemSendCloseResponse(FSP_FILE_SYSTEM *FileSystem,
FSP_FSCTL_TRANSACT_REQ *Request);
FSP_API NTSTATUS FspFileSystemSendCleanupResponse(FSP_FILE_SYSTEM *FileSystem,
FSP_FSCTL_TRANSACT_REQ *Request);
/*
* Path Handling
*/
FSP_API VOID FspPathPrefix(PWSTR Path, PWSTR *PPrefix, PWSTR *PRemain);
FSP_API VOID FspPathSuffix(PWSTR Path, PWSTR *PRemain, PWSTR *PSuffix);
FSP_API VOID FspPathCombine(PWSTR Prefix, PWSTR Suffix);
/*
* Utility
*/
FSP_API NTSTATUS FspNtStatusFromWin32(DWORD Error);
FSP_API VOID FspDebugLog(const char *format, ...);
#endif
#endif