Merge pull request #40083 from batrick/i49608

pacific: mds: define CephFS errors that replace standard errno values

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

diff --cc src/mds/CInode.cc
Simple merge

diff --cc src/mds/MDCache.cc
Simple merge

diff --cc src/mds/MDSRank.cc
Simple merge

diff --cc src/mds/Server.cc
Simple merge

diff --cc src/mds/Server.h
Simple merge

diff --cc src/mds/SessionMap.cc
Simple merge

diff --cc src/mds/StrayManager.cc
Simple merge