![]() Use FltFlushBuffers2 to more granularly control the flush type that the file system should do. If FileObject is for a volume, the file system will cause both the file data and metadata for all modified files on the volume will be written, and the underlying storage to be synchronized to flush its cache. ![]() If FileObject is for a file, both the file data and metadata in the file cache will be written, and the underlying storage will be synchronized to flush its cache. The flush operation is synchronous and is issued to the instance(s) below the specified Instance. ![]() This is an error code.Ī minifilter driver can call FltFlushBuffers to issue an IRP_MJ_FLUSH_BUFFERS request to the file system for a given file. The file resides on a volume that is not currently mounted. One might think that writing a file system filter would be a much easier task, since there are lots of starter samples available on internet, but the truth is to write a professional commercial file system filters in the real world is very hard.Sometime writing a file system filter driver is harder than a file system. ![]() The file resides on a write-protected volume. Return valueįltFlushBuffers returns STATUS_SUCCESS or an appropriate NTSTATUS value such as one of the following: Return code This parameter is required and cannot be NULL. This parameter is required and cannot be NULL.įile object pointer for the file to be flushed. Use FltFlushBuffers2 to specify different flush type options. The FltFlushBuffers routine is used by the minifilter driver to send a flush request for a given file to the file system.
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