SyncFileRangeFlags

no operation

Wait upon write-out of all pages in the specified range that have already been submitted to the device driver for write-out before performing any write.

Initiate write-out of all dirty pages in the specified range which are not presently submitted write-out. Note that even this may block if you attempt to write more than request queue size.

Wait upon write-out of all pages in the range after performing any write.

This is a write-for-data-integrity operation that will ensure that all pages in the specified range which were dirty when sync_file_range() was called are committed to disk.