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sys: rename FsContext to FileNode

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This commit is contained in:
Bill Zissimopoulos
2016-01-18 12:25:56 -08:00
parent 1dede99423
commit b17d70e462
8 changed files with 329 additions and 327 deletions
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152
src/sys/create.c
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@ -15,7 +15,7 @@ static NTSTATUS FspFsvolCreate(
FSP_IOPREP_DISPATCH FspFsvolCreatePrepare;
FSP_IOCMPL_DISPATCH FspFsvolCreateComplete;
static VOID FspFsvolCreatePostClose(
FSP_FILE_CONTEXT *FsContext, UINT64 UserContext2);
FSP_FILE_NODE *FileNode, UINT64 UserContext2);
static FSP_IOP_REQUEST_FINI FspFsvolCreateRequestFini;
static FSP_IOP_REQUEST_FINI FspFsvolCreateOverwriteRequestFini;
FSP_DRIVER_DISPATCH FspCreate;
@ -38,11 +38,11 @@ FSP_DRIVER_DISPATCH FspCreate;
enum
{
/* CreateRequest */
RequestFsContext = 0,
RequestFileNode = 0,
RequestAccessToken = 1,
RequestProcess = 2,
/* OverwriteRequest */
//RequestFsContext = 0,
//RequestFileNode = 0,
RequestFileObject = 1,
};
@ -117,7 +117,7 @@ static NTSTATUS FspFsvolCreate(
BOOLEAN IsAbsoluteSecurityDescriptor = FALSE;
BOOLEAN IsSelfRelativeSecurityDescriptor = FALSE;
BOOLEAN HasTrailingBackslash = FALSE;
FSP_FILE_CONTEXT *FsContext, *RelatedFsContext;
FSP_FILE_NODE *FileNode, *RelatedFileNode;
FSP_FSCTL_TRANSACT_REQ *Request;
/* cannot open files by fileid */
@ -185,10 +185,10 @@ static NTSTATUS FspFsvolCreate(
/* is this a relative or absolute open? */
if (0 != RelatedFileObject)
{
RelatedFsContext = RelatedFileObject->FsContext;
RelatedFileNode = RelatedFileObject->FsContext;
/* is this a valid RelatedFileObject? */
if (!FspFileContextIsValid(RelatedFsContext))
if (!FspFileNodeIsValid(RelatedFileNode))
return STATUS_OBJECT_PATH_NOT_FOUND;
/* must be a relative path */
@ -201,34 +201,34 @@ static NTSTATUS FspFsvolCreate(
FILE_OVERWRITE_IF == CreateDisposition ||
FILE_SUPERSEDE == CreateDisposition ||
BooleanFlagOn(Flags, SL_OPEN_TARGET_DIRECTORY)) &&
sizeof(WCHAR) == RelatedFsContext->FileName.Length && 0 == FileName.Length)
sizeof(WCHAR) == RelatedFileNode->FileName.Length && 0 == FileName.Length)
return STATUS_ACCESS_DENIED;
/* cannot FILE_DELETE_ON_CLOSE on the root directory */
if (FlagOn(CreateOptions, FILE_DELETE_ON_CLOSE) &&
sizeof(WCHAR) == RelatedFsContext->FileName.Length && 0 == FileName.Length)
sizeof(WCHAR) == RelatedFileNode->FileName.Length && 0 == FileName.Length)
return STATUS_CANNOT_DELETE;
/*
* There is no need to lock our accesses of RelatedFileObject->FsContext->FileName,
* because RelatedFileObject->FsContext->Filename is read-only (after creation) and
* because RelatedFileObject->FsContext is guaranteed to exist while RelatedFileObject
* There is no need to lock our accesses of RelatedFileObject->FileNode->FileName,
* because RelatedFileObject->FileNode->Filename is read-only (after creation) and
* because RelatedFileObject->FileNode is guaranteed to exist while RelatedFileObject
* exists.
*/
BOOLEAN AppendBackslash =
sizeof(WCHAR) * 2/* not empty or root */ <= RelatedFsContext->FileName.Length &&
sizeof(WCHAR) * 2/* not empty or root */ <= RelatedFileNode->FileName.Length &&
sizeof(WCHAR) <= FileName.Length && L':' != FileName.Buffer[0];
Result = FspFileContextCreate(FsvolDeviceObject,
RelatedFsContext->FileName.Length + AppendBackslash * sizeof(WCHAR) + FileName.Length,
&FsContext);
Result = FspFileNodeCreate(FsvolDeviceObject,
RelatedFileNode->FileName.Length + AppendBackslash * sizeof(WCHAR) + FileName.Length,
&FileNode);
if (!NT_SUCCESS(Result))
return Result;
Result = RtlAppendUnicodeStringToString(&FsContext->FileName, &RelatedFsContext->FileName);
Result = RtlAppendUnicodeStringToString(&FileNode->FileName, &RelatedFileNode->FileName);
ASSERT(NT_SUCCESS(Result));
if (AppendBackslash)
{
Result = RtlAppendUnicodeToString(&FsContext->FileName, L"\\");
Result = RtlAppendUnicodeToString(&FileNode->FileName, L"\\");
ASSERT(NT_SUCCESS(Result));
}
}
@ -252,31 +252,31 @@ static NTSTATUS FspFsvolCreate(
sizeof(WCHAR) == FileName.Length)
return STATUS_CANNOT_DELETE;
Result = FspFileContextCreate(FsvolDeviceObject,
Result = FspFileNodeCreate(FsvolDeviceObject,
FileName.Length,
&FsContext);
&FileNode);
if (!NT_SUCCESS(Result))
return Result;
}
Result = RtlAppendUnicodeStringToString(&FsContext->FileName, &FileName);
Result = RtlAppendUnicodeStringToString(&FileNode->FileName, &FileName);
ASSERT(NT_SUCCESS(Result));
/* create the user-mode file system request */
Result = FspIopCreateRequestEx(Irp, &FsContext->FileName, SecurityDescriptorSize,
Result = FspIopCreateRequestEx(Irp, &FileNode->FileName, SecurityDescriptorSize,
FspFsvolCreateRequestFini, &Request);
if (!NT_SUCCESS(Result))
{
FspFileContextRelease(FsContext);
FspFileNodeRelease(FileNode);
return Result;
}
/*
* The new request is associated with our IRP. Go ahead and associate our FsContext
* The new request is associated with our IRP. Go ahead and associate our FileNode
* with the Request as well. After this is done completing our IRP will automatically
* delete the Request and any associated resources.
*/
FspIopRequestContext(Request, RequestFsContext) = FsContext;
FspIopRequestContext(Request, RequestFileNode) = FileNode;
/* populate the Create request */
Request->Kind = FspFsctlTransactCreateKind;
@ -328,7 +328,7 @@ NTSTATUS FspFsvolCreatePrepare(
SECURITY_CLIENT_CONTEXT SecurityClientContext;
HANDLE UserModeAccessToken;
PEPROCESS Process;
FSP_FILE_CONTEXT *FsContext;
FSP_FILE_NODE *FileNode;
PFILE_OBJECT FileObject;
if (FspFsctlTransactCreateKind == Request->Kind)
@ -370,11 +370,11 @@ NTSTATUS FspFsvolCreatePrepare(
}
else if (FspFsctlTransactOverwriteKind == Request->Kind)
{
FsContext = FspIopRequestContext(Request, RequestFsContext);
FileNode = FspIopRequestContext(Request, RequestFileNode);
FileObject = FspIopRequestContext(Request, RequestFileObject);
/* lock the FsContext for Paging IO */
Success = FspFileContextPgioLockExclusive(FsContext, FALSE);
/* lock the FileNode for Paging IO */
Success = FspFileNodePgioLockExclusive(FileNode, FALSE);
if (!Success)
{
/* repost the IRP to retry later */
@ -389,19 +389,19 @@ NTSTATUS FspFsvolCreatePrepare(
/* see what the MM thinks about all this */
LARGE_INTEGER Zero = { 0 };
Success = MmCanFileBeTruncated(&FsContext->NonPaged->SectionObjectPointers, &Zero);
Success = MmCanFileBeTruncated(&FileNode->NonPaged->SectionObjectPointers, &Zero);
if (!Success)
{
FspFileContextPgioUnlock(FsContext);
FspFileNodePgioUnlock(FileNode);
FspFsvolCreatePostClose(FsContext, (UINT_PTR)FileObject->FsContext2);
FspFileContextClose(FsContext, FileObject, 0);
FspFsvolCreatePostClose(FileNode, (UINT_PTR)FileObject->FsContext2);
FspFileNodeClose(FileNode, FileObject, 0);
return STATUS_USER_MAPPED_FILE;
}
/* purge any caches on this file */
CcPurgeCacheSection(&FsContext->NonPaged->SectionObjectPointers, 0, 0, FALSE);
CcPurgeCacheSection(&FileNode->NonPaged->SectionObjectPointers, 0, 0, FALSE);
return STATUS_SUCCESS;
}
@ -422,8 +422,8 @@ VOID FspFsvolCreateComplete(
FSP_FSVOL_DEVICE_EXTENSION *FsvolDeviceExtension = FspFsvolDeviceExtension(FsvolDeviceObject);
PFILE_OBJECT FileObject = IrpSp->FileObject;
FSP_FSCTL_TRANSACT_REQ *Request = FspIrpRequest(Irp);
FSP_FILE_CONTEXT *FsContext = FspIopRequestContext(Request, RequestFsContext);
FSP_FILE_CONTEXT *OpenedFsContext;
FSP_FILE_NODE *FileNode = FspIopRequestContext(Request, RequestFileNode);
FSP_FILE_NODE *OpenedFileNode;
UNICODE_STRING ReparseFileName;
BOOLEAN DeleteOnClose;
@ -494,36 +494,36 @@ VOID FspFsvolCreateComplete(
FSP_RETURN();
}
/* populate the FsContext fields from the Response */
FsContext->Header.AllocationSize.QuadPart = Response->Rsp.Create.Opened.AllocationSize;
FsContext->Header.FileSize.QuadPart = Response->Rsp.Create.Opened.FileSize;
FsContext->UserContext = Response->Rsp.Create.Opened.UserContext;
/* populate the FileNode fields from the Response */
FileNode->Header.AllocationSize.QuadPart = Response->Rsp.Create.Opened.AllocationSize;
FileNode->Header.FileSize.QuadPart = Response->Rsp.Create.Opened.FileSize;
FileNode->UserContext = Response->Rsp.Create.Opened.UserContext;
DeleteOnClose = BooleanFlagOn(Request->Req.Create.CreateOptions, FILE_DELETE_ON_CLOSE);
/* open the FsContext */
OpenedFsContext = FspFileContextOpen(FsContext, FileObject,
/* open the FileNode */
OpenedFileNode = FspFileNodeOpen(FileNode, FileObject,
Response->Rsp.Create.Opened.GrantedAccess, IrpSp->Parameters.Create.ShareAccess,
DeleteOnClose,
&Result);
if (0 == OpenedFsContext)
if (0 == OpenedFileNode)
{
/* unable to open the FsContext; post a Close request */
FspFsvolCreatePostClose(FsContext,
/* unable to open the FileNode; post a Close request */
FspFsvolCreatePostClose(FileNode,
Response->Rsp.Create.Opened.UserContext2);
FSP_RETURN();
}
FsContext = OpenedFsContext;
FileNode = OpenedFileNode;
/* set up the FileObject */
if (0 != FsvolDeviceExtension->FsvrtDeviceObject)
#pragma prefast(disable:28175, "We are a filesystem: ok to access Vpb")
FileObject->Vpb = FsvolDeviceExtension->FsvrtDeviceObject->Vpb;
FileObject->SectionObjectPointer = &FsContext->NonPaged->SectionObjectPointers;
FileObject->SectionObjectPointer = &FileNode->NonPaged->SectionObjectPointers;
FileObject->PrivateCacheMap = 0;
FileObject->FsContext = FsContext;
FileObject->FsContext = FileNode;
FileObject->FsContext2 = (PVOID)(UINT_PTR)Response->Rsp.Create.Opened.UserContext2;
if (FILE_OPENED == Response->IoStatus.Information)
@ -540,12 +540,12 @@ VOID FspFsvolCreateComplete(
if (FlagOn(Response->Rsp.Create.Opened.GrantedAccess, FILE_WRITE_DATA) ||
DeleteOnClose)
{
if (!MmFlushImageSection(&FsContext->NonPaged->SectionObjectPointers,
if (!MmFlushImageSection(&FileNode->NonPaged->SectionObjectPointers,
MmFlushForWrite))
{
FspFsvolCreatePostClose(FsContext,
FspFsvolCreatePostClose(FileNode,
Response->Rsp.Create.Opened.UserContext2);
FspFileContextClose(FsContext, FileObject, 0);
FspFileNodeClose(FileNode, FileObject, 0);
Result = DeleteOnClose ? STATUS_CANNOT_DELETE : STATUS_SHARING_VIOLATION;
FSP_RETURN();
@ -553,7 +553,7 @@ VOID FspFsvolCreateComplete(
}
/* SUCCESS! */
FspIopRequestContext(Request, RequestFsContext) = 0;
FspIopRequestContext(Request, RequestFileNode) = 0;
Irp->IoStatus.Information = (ULONG_PTR)Response->IoStatus.Information;
Result = STATUS_SUCCESS;
}
@ -571,17 +571,17 @@ VOID FspFsvolCreateComplete(
/* create the Overwrite request; MustSucceed because we must either overwrite or close */
FspIopCreateRequestFunnel(Irp,
FsvolDeviceExtension->VolumeParams.FileNameRequired ? &FsContext->FileName : 0, 0,
FsvolDeviceExtension->VolumeParams.FileNameRequired ? &FileNode->FileName : 0, 0,
FspFsvolCreateOverwriteRequestFini, TRUE,
&Request);
/* associate the FsContext and FileObject with the Overwrite request */
FspIopRequestContext(Request, RequestFsContext) = FsContext;
/* associate the FileNode and FileObject with the Overwrite request */
FspIopRequestContext(Request, RequestFileNode) = FileNode;
FspIopRequestContext(Request, RequestFileObject) = FileObject;
/* populate the Overwrite request */
Request->Kind = FspFsctlTransactOverwriteKind;
Request->Req.Overwrite.UserContext = FsContext->UserContext;
Request->Req.Overwrite.UserContext = FileNode->UserContext;
Request->Req.Overwrite.UserContext2 = (UINT_PTR)FileObject->FsContext2;
Request->Req.Overwrite.FileAttributes = IrpSp->Parameters.Create.FileAttributes;
Request->Req.Overwrite.Supersede = FILE_SUPERSEDED == Response->IoStatus.Information;
@ -597,7 +597,7 @@ VOID FspFsvolCreateComplete(
else
{
/* SUCCESS! */
FspIopRequestContext(Request, RequestFsContext) = 0;
FspIopRequestContext(Request, RequestFileNode) = 0;
Irp->IoStatus.Information = (ULONG_PTR)Response->IoStatus.Information;
Result = STATUS_SUCCESS;
}
@ -612,9 +612,9 @@ VOID FspFsvolCreateComplete(
/* did the user-mode file system sent us a failure code? */
if (!NT_SUCCESS(Response->IoStatus.Status))
{
FspFileContextPgioUnlock(FsContext);
FspFileNodePgioUnlock(FileNode);
FspFileContextClose(FsContext, FileObject, 0);
FspFileNodeClose(FileNode, FileObject, 0);
Irp->IoStatus.Information = 0;
Result = Response->IoStatus.Status;
@ -622,14 +622,14 @@ VOID FspFsvolCreateComplete(
}
/* file was successfully overwritten/superseded */
FsContext->Header.AllocationSize.QuadPart = Response->Rsp.Overwrite.AllocationSize;
FsContext->Header.FileSize.QuadPart = Response->Rsp.Overwrite.FileSize;
CcSetFileSizes(FileObject, (PCC_FILE_SIZES)&FsContext->Header.AllocationSize);
FileNode->Header.AllocationSize.QuadPart = Response->Rsp.Overwrite.AllocationSize;
FileNode->Header.FileSize.QuadPart = Response->Rsp.Overwrite.FileSize;
CcSetFileSizes(FileObject, (PCC_FILE_SIZES)&FileNode->Header.AllocationSize);
FspFileContextPgioUnlock(FsContext);
FspFileNodePgioUnlock(FileNode);
/* SUCCESS! */
FspIopRequestContext(Request, RequestFsContext) = 0;
FspIopRequestContext(Request, RequestFileNode) = 0;
Irp->IoStatus.Information = Request->Req.Overwrite.Supersede ? FILE_SUPERSEDED : FILE_OVERWRITTEN;
Result = STATUS_SUCCESS;
}
@ -642,22 +642,22 @@ VOID FspFsvolCreateComplete(
}
static VOID FspFsvolCreatePostClose(
FSP_FILE_CONTEXT *FsContext, UINT64 UserContext2)
FSP_FILE_NODE *FileNode, UINT64 UserContext2)
{
PAGED_CODE();
PDEVICE_OBJECT FsvolDeviceObject = FsContext->FsvolDeviceObject;
PDEVICE_OBJECT FsvolDeviceObject = FileNode->FsvolDeviceObject;
FSP_FSVOL_DEVICE_EXTENSION *FsvolDeviceExtension = FspFsvolDeviceExtension(FsvolDeviceObject);
FSP_FSCTL_TRANSACT_REQ *Request;
/* create the user-mode file system request; MustSucceed because we cannot fail */
FspIopCreateRequestMustSucceed(0,
FsvolDeviceExtension->VolumeParams.FileNameRequired ? &FsContext->FileName : 0,
FsvolDeviceExtension->VolumeParams.FileNameRequired ? &FileNode->FileName : 0,
0, &Request);
/* populate the Close request */
Request->Kind = FspFsctlTransactCloseKind;
Request->Req.Close.UserContext = FsContext->UserContext;
Request->Req.Close.UserContext = FileNode->UserContext;
Request->Req.Close.UserContext2 = UserContext2;
/*
@ -678,10 +678,10 @@ static VOID FspFsvolCreateRequestFini(PVOID Context[3])
{
PAGED_CODE();
if (0 != Context[RequestFsContext])
if (0 != Context[RequestFileNode])
{
FspFileContextRelease(Context[RequestFsContext]);
Context[RequestFsContext] = 0;
FspFileNodeRelease(Context[RequestFileNode]);
Context[RequestFileNode] = 0;
}
if (0 != Context[RequestAccessToken])
@ -717,21 +717,21 @@ static VOID FspFsvolCreateOverwriteRequestFini(PVOID Context[3])
{
PAGED_CODE();
if (0 != Context[RequestFsContext])
if (0 != Context[RequestFileNode])
{
FSP_FILE_CONTEXT *FsContext = Context[RequestFsContext];
FSP_FILE_NODE *FileNode = Context[RequestFileNode];
PFILE_OBJECT FileObject = Context[RequestFileObject];
if (0 != FileObject)
{
FspFsvolCreatePostClose(FsContext, (UINT_PTR)FileObject->FsContext2);
FspFileContextClose(FsContext, FileObject, 0);
FspFsvolCreatePostClose(FileNode, (UINT_PTR)FileObject->FsContext2);
FspFileNodeClose(FileNode, FileObject, 0);
}
FspFileContextRelease(FsContext);
FspFileNodeRelease(FileNode);
Context[RequestFileObject] = 0;
Context[RequestFsContext] = 0;
Context[RequestFileNode] = 0;
}
}