Merge PR #57754 into main

* refs/pull/57754/head:
	mds: set the proper extra bl for the create request
	mds: encode the correct extra info depending on the feature bits
	mds: add set_reply_extra_bl() helper support
	mds: cleanup the code to make it to be more readable

Reviewed-by: Patrick Donnelly <pdonnell@redhat.com>
Reviewed-by: Greg Farnum <gfarnum@redhat.com>