libnvme(9) API Manual libnvme(9)

struct nvme_registrant_ext - Registrant Extended Data Structure

struct nvme_registrant_ext {
__le16 cntlid;
__u8 rcsts;
__u8 rsvd3[5];
__le64 rkey;
__u8 hostid[16];
__u8 rsvd32[32];
};

Controller ID
Reservation Status
Reserved
Reservation Key
Host Identifier
Reserved
struct nvme_registrant_ext October 2026