DOKK / manpages / debian 12 / libnvme-dev / nvme_resv_cptpl.2.en
libnvme(2) API Manual libnvme(2)

enum nvme_resv_cptpl - Reservation Register - Change Persist Through Power Loss State

enum nvme_resv_cptpl {
NVME_RESERVATION_CPTPL_NO_CHANGE ,
NVME_RESERVATION_CPTPL_CLEAR ,
NVME_RESERVATION_CPTPL_PERSIST

};

No change to PTPL state
Reservations are released and registrants are cleared on a power on
Reservations and registrants persist across a power loss
enum nvme_resv_cptpl January 2023