Merge PR #26764 into master

* refs/pull/26764/head:
	mgr: 'osd df' by specified class or (crush) name
	mon/OSDMonitor: add 'osd crush get-device-class' command

diff --cc qa/workunits/cephtool/test.sh
Simple merge

diff --cc src/mon/MonCommands.h
Simple merge

diff --cc src/mon/OSDMonitor.cc
Simple merge

diff --cc src/osd/OSDMap.cc
Simple merge