libnvme(9)                        API Manual                        libnvme(9)

NAME
       enum nvme_constants - A place to stash various constant nvme values

SYNOPSIS
       enum nvme_constants {
           NVME_NSID_ALL ,
           NVME_NSID_NONE ,
           NVME_UUID_NONE ,
           NVME_CNTLID_NONE ,
           NVME_CNSSPECID_NONE ,
           NVME_LOG_LSP_NONE ,
           NVME_LOG_LSI_NONE ,
           NVME_LOG_LPO_NONE ,
           NVME_IDENTIFY_DATA_SIZE ,
           NVME_LOG_SUPPORTED_LOG_PAGES_MAX ,
           NVME_ID_NVMSET_LIST_MAX ,
           NVME_ID_UUID_LIST_MAX ,
           NVME_ID_CTRL_LIST_MAX ,
           NVME_ID_NS_LIST_MAX ,
           NVME_ID_SECONDARY_CTRL_MAX ,
           NVME_ID_DOMAIN_LIST_MAX ,
           NVME_ID_ENDURANCE_GROUP_LIST_MAX ,
           NVME_ID_ND_DESCRIPTOR_MAX ,
           NVME_FEAT_LBA_RANGE_MAX ,
           NVME_LOG_ST_MAX_RESULTS ,
           NVME_LOG_TELEM_BLOCK_SIZE ,
           NVME_LOG_FID_SUPPORTED_EFFECTS_MAX ,
           NVME_LOG_MI_CMD_SUPPORTED_EFFECTS_MAX ,
           NVME_LOG_MI_CMD_SUPPORTED_EFFECTS_RESERVED ,
           NVME_DSM_MAX_RANGES ,
           NVME_NQN_LENGTH ,
           NVMF_TRADDR_SIZE ,
           NVMF_TSAS_SIZE ,
           NVME_ZNS_CHANGED_ZONES_MAX ,
           NVME_STREAM_ID_MAX ,
           NVME_UNDERLYING_NS_LIST_MAX

       };

Constants
       NVME_NSID_ALL
                   A broadcast value that is used to specify all namespaces

       NVME_NSID_NONE
                   The invalid namespace id, for when the nsid parameter is
                   not used in a command

       NVME_UUID_NONE
                   Use to omit a uuid command parameter

       NVME_CNTLID_NONE
                   Use to omit a cntlid command parameter

       NVME_CNSSPECID_NONE
                   Use to omit a cns_specific_id command parameter

       NVME_LOG_LSP_NONE
                   Use to omit a log lsp command parameter

       NVME_LOG_LSI_NONE
                   Use to omit a log lsi command parameter

       NVME_LOG_LPO_NONE
                   Use to omit a log lpo command parameter

       NVME_IDENTIFY_DATA_SIZE
                   The transfer size for nvme identify commands

       NVME_LOG_SUPPORTED_LOG_PAGES_MAX
                   The largest possible index in the supported log pages log.

       NVME_ID_NVMSET_LIST_MAX
                   The largest possible nvmset index in identify nvmeset

       NVME_ID_UUID_LIST_MAX
                   The largest possible uuid index in identify uuid list

       NVME_ID_CTRL_LIST_MAX
                   The largest possible controller index in identify
                   controller list

       NVME_ID_NS_LIST_MAX
                   The largest possible namespace index in identify namespace
                   list

       NVME_ID_SECONDARY_CTRL_MAX
                   The largest possible secondary controller index in identify
                   secondary controller

       NVME_ID_DOMAIN_LIST_MAX
                   The largest possible domain index in the in domain list

       NVME_ID_ENDURANCE_GROUP_LIST_MAX
                   The largest possible endurance group index in the endurance
                   group list

       NVME_ID_ND_DESCRIPTOR_MAX
                   The largest possible namespace granularity index in the
                   namespace granularity descriptor list (i.e. with the LBA
                   Format Extension Enable field set to 1h in the Host
                   Behavior Support feature)

       NVME_FEAT_LBA_RANGE_MAX
                   The largest possible LBA range index in feature lba range
                   type

       NVME_LOG_ST_MAX_RESULTS
                   The largest possible self test result index in the device
                   self test log

       NVME_LOG_TELEM_BLOCK_SIZE
                   Specification defined size of Telemetry Data Blocks

       NVME_LOG_FID_SUPPORTED_EFFECTS_MAX
                   The largest possible FID index in the feature identifiers
                   effects log.

       NVME_LOG_MI_CMD_SUPPORTED_EFFECTS_MAX
                   The largest possible MI Command index in the MI Command
                   effects log.

       NVME_LOG_MI_CMD_SUPPORTED_EFFECTS_RESERVED
                   The reserved space in the MI Command effects log.

       NVME_DSM_MAX_RANGES
                   The largest possible range index in a data-set management
                   command

       NVME_NQN_LENGTH
                   Max length for NVMe Qualified Name

       NVMF_TRADDR_SIZE
                   Max Transport Address size

       NVMF_TSAS_SIZE
                   Max Transport Specific Address Subtype size

       NVME_ZNS_CHANGED_ZONES_MAX
                   Max number of zones in the changed zones log page

       NVME_STREAM_ID_MAX
                   Max number of stream IDs

       NVME_UNDERLYING_NS_LIST_MAX
                   The maximum number of Underlying Namespace Entry data
                   structures reportable in the Get Underlying Namespace List
                   Identify data structure

October 2026                  enum nvme_constants                   libnvme(9)