ceph/ceph — pull request #3030 by cmgitdream (2014-11-28 09:27:28+00:00)
Title: Wip copy on read stable

copy-on-read stabe commits:
This commits are based on
cmgitdream's commits
librbd : v3 copy-on-read for clones : https://github.com/ceph/ceph/pull/2158
and
cchengleo's commits
Wip copy on read : https://github.com/ceph/ceph/pull/2587