- Fix potential for corruption during cluster mirror device failure.
- Fix 'lvconvert --splitmirrors' in cluster operation.
- Ignore snapshots when performing mirror recovery beneath an origin.
- Add suspend_lv_origin and resume_lv_origin using LCK_ORIGIN_ONLY.
- Allow internal suspend and resume of origin without its snapshots.
- Fix dev_manager_transient to access -real device not snapshot-origin.
- Monitor origin -real device below snapshot instead of overlay device.