Ceph » RADOS

libcephfs doesn't use librados, so it doesn't need any changes.

The rados_mon_op_timeout affects anything that uses MonClient.start_mon_command (start_mon_command reads that setting), which also includes the OSD, MDS and mgr daemons. It is probably best to make that timeout an optional runtime setting on MonClient, and have the config option handled from librados, so that those other MonClient users won't have to explicitly zero out the config option.