Or you mean .... Oceana, part of the P & O fleet? If so the news is a little more restricting because on her smoking is only allowed outside in certain areas of the deck.
If instead of "All Cruise" as the Subject you had been more specific it would have helped .... Neil.
Oceania Website provides the answer.........strangely enough: What is the smoking policy of Oceania Cruises?
For the safety and security of all guests and staff onboard, Designated Smoking Areas are available on Deck 9, the forward starboard corner of the Pool Deck, and Deck 10, in the aft, port corner of Horizons. These areas are comfortably furnished and conveniently located near food and beverage areas.
Smoking is expressly forbidden in all Staterooms and Suites, on verandas, or in any areas of the ship other than officially Designated Smoking Areas. Smoking in a stateroom or suite or on a veranda represents a serious fire and safety hazard to all guests and staff. Guests choosing to disregard this policy will be disembarked at the next port of call and may also be subject to additional fees that will be imposed to cover the costs associated with any damage to and the required cleaning of furnishings, verandas and surrounding deck and accommodation areas.
All areas other than those specified as Designated Smoking Areas will remain smoke-free. This includes all guest suites and staterooms, verandas, restaurants, public areas, the Casino and all other areas of the ship. Cigar and Pipe smoking is only permitted on the forward starboard corner of the Pool Deck.