FltSetInformationFile function (fltkernel.h)
FltSetInformationFile sets information for a given file.
Syntax
NTSTATUS FLTAPI FltSetInformationFile(
[in] PFLT_INSTANCE Instance,
[in] PFILE_OBJECT FileObject,
[in] PVOID FileInformation,
[in] ULONG Length,
[in] FILE_INFORMATION_CLASS FileInformationClass
);
Parameters
[in] Instance
Opaque instance pointer for the caller. This parameter is required and cannot be NULL.
[in] FileObject
File object pointer for the file. This parameter is required and cannot be NULL.
[in] FileInformation
Pointer to a caller-allocated buffer that contains information to be set for the file. The FileInformationClass parameter specifies the type of information. This parameter is required and cannot be NULL.
[in] Length
Size, in bytes, of the FileInformation buffer.
[in] FileInformationClass
Specifies the type of information to be set for the file. The following values are defined.
| Value | Meaning |
|---|---|
| FileAllocationInformation | Set FILE_ALLOCATION_INFORMATION for the file. |
| FileBasicInformation | Set FILE_BASIC_INFORMATION for the file. |
| FileDispositionInformation | Set FILE_DISPOSITION_INFORMATION for the file. |
| FileEndOfFileInformation | Set FILE_END_OF_FILE_INFORMATION for the file. |
| FileLinkInformation | Set FILE_LINK_INFORMATION for the file. |
| FilePositionInformation | Set FILE_POSITION_INFORMATION for the file. |
| FileRenameInformation | Set FILE_RENAME_INFORMATION for the file. For more information about file renaming, see the following Remarks section. |
| FileValidDataLengthInformation | Set FILE_VALID_DATA_LENGTH_INFORMATION for the file. |
Return value
FltSetInformationFile returns STATUS_SUCCESS or an appropriate NTSTATUS value.
Remarks
A minifilter driver calls FltSetInformationFile to set information for a given file. The file must currently be open.
A file rename operation imposes the following restriction on the parameter values passed to FltSetInformationFile: As noted in the reference entry for FILE_RENAME_INFORMATION, a file or directory can only be renamed within a volume. In other words, a rename operation cannot cause a file or directory to be moved to a different volume. Unlike ZwSetInformationFile, FltSetInformationFile does not validate the contents of the FILE_RENAME_INFORMATION structure. Thus the caller of FltSetInformationFile is responsible for ensuring that the new name for the file or directory is on the same volume as the old name.
Minifilter drivers must use FltSetInformationFile , not ZwSetInformationFile, to rename a file.
Requirements
| Requirement | Value |
|---|---|
| Target Platform | Universal |
| Header | fltkernel.h (include Fltkernel.h) |
| Library | FltMgr.lib |
| DLL | Fltmgr.sys |
| IRQL | PASSIVE_LEVEL |