enum nvme_status_type - type encoding for NVMe return values, when represented as an int.

NVME_STATUS_TYPE_SHIFT shift value for status bits NVME_STATUS_TYPE_MASK mask value for status bits NVME_STATUS_TYPE_NVME NVMe command status value, typically from CDW3 NVME_STATUS_TYPE_MI NVMe-MI header status

The nvme_* api returns an int, with negative values indicating an internal or syscall error, zero signifying success, positive values representing the NVMe status. That latter case (the NVMe status) may represent status values from different parts of the transport/controller/etc, and are at most 16 bits of data. So, we use the most-significant 3 bits of the signed int to indicate which type of status this is. August 2025 enum nvme_status_type libnvme(2)

enum nvme_status_type - type encoding for NVMe return values, when represented as an int.

enum nvme_status_type { NVME_STATUS_TYPE_SHIFT , NVME_STATUS_TYPE_MASK , NVME_STATUS_TYPE_NVME , NVME_STATUS_TYPE_MI };