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dll: FspFileSystemOpRead, FspFileSystemOpWrite

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This commit is contained in:
Bill Zissimopoulos 2016-03-04 22:45:14 -08:00
parent 8b9e8499aa
commit df1343cd9d
5 changed files with 91 additions and 5 deletions
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3
inc/winfsp/fsctl.h
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@ -197,8 +197,7 @@ typedef struct
UINT64 Offset;
UINT32 Length;
UINT32 Key;
UINT32 Append:1; /* append to end of file */
UINT32 PagingIo:1; /* write's beyond EOF are NOP's (file size remains same) */
UINT32 Constrained:1; /* write's beyond EOF are NOP's (file size remains same) */
} Write;
struct
{

14
inc/winfsp/winfsp.h
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@ -64,6 +64,14 @@ typedef struct _FSP_FILE_SYSTEM_INTERFACE
VOID (*Close)(FSP_FILE_SYSTEM *FileSystem,
FSP_FSCTL_TRANSACT_REQ *Request,
PVOID FileNode);
NTSTATUS (*Read)(FSP_FILE_SYSTEM *FileSystem,
FSP_FSCTL_TRANSACT_REQ *Request,
PVOID FileNode, PVOID Buffer, UINT64 Offset, ULONG Length,
PULONG PBytesTransferred, FSP_FSCTL_FILE_INFO *FileInfo);
NTSTATUS (*Write)(FSP_FILE_SYSTEM *FileSystem,
FSP_FSCTL_TRANSACT_REQ *Request,
PVOID FileNode, PVOID Buffer, UINT64 Offset, ULONG Length, BOOLEAN Constrained,
PULONG PBytesTransferred, FSP_FSCTL_FILE_INFO *FileInfo);
NTSTATUS (*GetFileInfo)(FSP_FILE_SYSTEM *FileSystem,
FSP_FSCTL_TRANSACT_REQ *Request,
PVOID FileNode,
@ -117,6 +125,8 @@ FSP_API NTSTATUS FspFileSystemCreate(PWSTR DevicePath,
FSP_API VOID FspFileSystemDelete(FSP_FILE_SYSTEM *FileSystem);
FSP_API NTSTATUS FspFileSystemStartDispatcher(FSP_FILE_SYSTEM *FileSystem, ULONG ThreadCount);
FSP_API VOID FspFileSystemStopDispatcher(FSP_FILE_SYSTEM *FileSystem);
FSP_API VOID FspFileSystemSendResponse(FSP_FILE_SYSTEM *FileSystem,
FSP_FSCTL_TRANSACT_RSP *Response);
static inline
VOID FspFileSystemEnterOperation(FSP_FILE_SYSTEM *FileSystem,
FSP_FSCTL_TRANSACT_REQ *Request, FSP_FSCTL_TRANSACT_RSP *Response)
@ -174,6 +184,10 @@ FSP_API NTSTATUS FspFileSystemOpCleanup(FSP_FILE_SYSTEM *FileSystem,
FSP_FSCTL_TRANSACT_REQ *Request, FSP_FSCTL_TRANSACT_RSP *Response);
FSP_API NTSTATUS FspFileSystemOpClose(FSP_FILE_SYSTEM *FileSystem,
FSP_FSCTL_TRANSACT_REQ *Request, FSP_FSCTL_TRANSACT_RSP *Response);
FSP_API NTSTATUS FspFileSystemOpRead(FSP_FILE_SYSTEM *FileSystem,
FSP_FSCTL_TRANSACT_REQ *Request, FSP_FSCTL_TRANSACT_RSP *Response);
FSP_API NTSTATUS FspFileSystemOpWrite(FSP_FILE_SYSTEM *FileSystem,
FSP_FSCTL_TRANSACT_REQ *Request, FSP_FSCTL_TRANSACT_RSP *Response);
FSP_API NTSTATUS FspFileSystemOpQueryInformation(FSP_FILE_SYSTEM *FileSystem,
FSP_FSCTL_TRANSACT_REQ *Request, FSP_FSCTL_TRANSACT_RSP *Response);
FSP_API NTSTATUS FspFileSystemOpSetInformation(FSP_FILE_SYSTEM *FileSystem,

17
src/dll/dispatch.c
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@ -44,11 +44,13 @@ FSP_API NTSTATUS FspFileSystemCreate(PWSTR DevicePath,
FileSystem->Operations[FspFsctlTransactOverwriteKind] = FspFileSystemOpOverwrite;
FileSystem->Operations[FspFsctlTransactCleanupKind] = FspFileSystemOpCleanup;
FileSystem->Operations[FspFsctlTransactCloseKind] = FspFileSystemOpClose;
FileSystem->Operations[FspFsctlTransactReadKind] = FspFileSystemOpRead;
FileSystem->Operations[FspFsctlTransactWriteKind] = FspFileSystemOpWrite;
// !!!: ...
FileSystem->Operations[FspFsctlTransactQueryInformationKind] = FspFileSystemOpQueryInformation;
FileSystem->Operations[FspFsctlTransactSetInformationKind] = FspFileSystemOpSetInformation;
FileSystem->Operations[FspFsctlTransactQueryVolumeInformationKind] = FspFileSystemOpQueryVolumeInformation;
FileSystem->Operations[FspFsctlTransactSetVolumeInformationKind] = FspFileSystemOpSetVolumeInformation;
// !!!: ...
FileSystem->Operations[FspFsctlTransactQuerySecurityKind] = FspFileSystemOpQuerySecurity;
FileSystem->Operations[FspFsctlTransactSetSecurityKind] = FspFileSystemOpSetSecurity;
FileSystem->Interface = Interface;
@ -132,6 +134,8 @@ static DWORD WINAPI FspFileSystemDispatcherThread(PVOID FileSystem0)
Response->Hint = Request->Hint;
Response->IoStatus.Status = STATUS_INVALID_DEVICE_REQUEST;
}
else if (STATUS_PENDING == Response->IoStatus.Status)
memset(Response, 0, sizeof *Response);
else
{
memset((PUINT8)Response + Response->Size, 0, ResponseSize - Response->Size);
@ -194,3 +198,14 @@ FSP_API VOID FspFileSystemStopDispatcher(FSP_FILE_SYSTEM *FileSystem)
WaitForSingleObject(FileSystem->DispatcherThread, INFINITE);
CloseHandle(FileSystem->DispatcherThread);
}
FSP_API VOID FspFileSystemSendResponse(FSP_FILE_SYSTEM *FileSystem,
FSP_FSCTL_TRANSACT_RSP *Response)
{
NTSTATUS Result;
Result = FspFsctlTransact(FileSystem->VolumeHandle,
Response, Response->Size, 0, 0, FALSE);
if (!NT_SUCCESS(Result))
FspFsctlStop(FileSystem->VolumeHandle);
}

59
src/dll/fsop.c
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@ -402,6 +402,65 @@ FSP_API NTSTATUS FspFileSystemOpClose(FSP_FILE_SYSTEM *FileSystem,
return STATUS_SUCCESS;
}
FSP_API NTSTATUS FspFileSystemOpRead(FSP_FILE_SYSTEM *FileSystem,
FSP_FSCTL_TRANSACT_REQ *Request, FSP_FSCTL_TRANSACT_RSP *Response)
{
NTSTATUS Result;
ULONG BytesTransferred;
FSP_FSCTL_FILE_INFO FileInfo;
if (0 == FileSystem->Interface->Read)
return STATUS_INVALID_DEVICE_REQUEST;
Result = FileSystem->Interface->Read(FileSystem, Request,
(PVOID)Request->Req.Read.UserContext,
(PVOID)Request->Req.Read.Address,
Request->Req.Read.Offset,
Request->Req.Read.Length,
&BytesTransferred,
&FileInfo);
if (!NT_SUCCESS(Result))
return Result;
if (STATUS_PENDING != Result)
{
Response->IoStatus.Information = BytesTransferred;
memcpy(&Response->Rsp.Read.FileInfo, &FileInfo, sizeof FileInfo);
}
return Result;
}
FSP_API NTSTATUS FspFileSystemOpWrite(FSP_FILE_SYSTEM *FileSystem,
FSP_FSCTL_TRANSACT_REQ *Request, FSP_FSCTL_TRANSACT_RSP *Response)
{
NTSTATUS Result;
ULONG BytesTransferred;
FSP_FSCTL_FILE_INFO FileInfo;
if (0 == FileSystem->Interface->Write)
return STATUS_INVALID_DEVICE_REQUEST;
Result = FileSystem->Interface->Write(FileSystem, Request,
(PVOID)Request->Req.Write.UserContext,
(PVOID)Request->Req.Write.Address,
Request->Req.Write.Offset,
Request->Req.Write.Length,
Request->Req.Write.Constrained,
&BytesTransferred,
&FileInfo);
if (!NT_SUCCESS(Result))
return Result;
if (STATUS_PENDING != Result)
{
Response->IoStatus.Information = BytesTransferred;
memcpy(&Response->Rsp.Read.FileInfo, &FileInfo, sizeof FileInfo);
}
return Result;
}
FSP_API NTSTATUS FspFileSystemOpQueryInformation(FSP_FILE_SYSTEM *FileSystem,
FSP_FSCTL_TRANSACT_REQ *Request, FSP_FSCTL_TRANSACT_RSP *Response)
{

3
src/sys/write.c
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@ -271,8 +271,7 @@ static NTSTATUS FspFsvolWriteNonCached(
Request->Req.Write.Offset = WriteOffset.QuadPart;
Request->Req.Write.Length = WriteLength;
Request->Req.Write.Key = WriteKey;
Request->Req.Write.Append = WriteToEndOfFile;
Request->Req.Write.PagingIo = PagingIo;
Request->Req.Write.Constrained = PagingIo;
return FSP_STATUS_IOQ_POST;
}