.TH "libnvme" 9 "enum nvme_constants" "October 2026" "API Manual" LINUX
.SH NAME
enum nvme_constants \- A place to stash various constant nvme values
.SH SYNOPSIS
enum nvme_constants {
.br
.BI "    NVME_NSID_ALL"
, 
.br
.br
.BI "    NVME_NSID_NONE"
, 
.br
.br
.BI "    NVME_UUID_NONE"
, 
.br
.br
.BI "    NVME_CNTLID_NONE"
, 
.br
.br
.BI "    NVME_CNSSPECID_NONE"
, 
.br
.br
.BI "    NVME_LOG_LSP_NONE"
, 
.br
.br
.BI "    NVME_LOG_LSI_NONE"
, 
.br
.br
.BI "    NVME_LOG_LPO_NONE"
, 
.br
.br
.BI "    NVME_IDENTIFY_DATA_SIZE"
, 
.br
.br
.BI "    NVME_LOG_SUPPORTED_LOG_PAGES_MAX"
, 
.br
.br
.BI "    NVME_ID_NVMSET_LIST_MAX"
, 
.br
.br
.BI "    NVME_ID_UUID_LIST_MAX"
, 
.br
.br
.BI "    NVME_ID_CTRL_LIST_MAX"
, 
.br
.br
.BI "    NVME_ID_NS_LIST_MAX"
, 
.br
.br
.BI "    NVME_ID_SECONDARY_CTRL_MAX"
, 
.br
.br
.BI "    NVME_ID_DOMAIN_LIST_MAX"
, 
.br
.br
.BI "    NVME_ID_ENDURANCE_GROUP_LIST_MAX"
, 
.br
.br
.BI "    NVME_ID_ND_DESCRIPTOR_MAX"
, 
.br
.br
.BI "    NVME_FEAT_LBA_RANGE_MAX"
, 
.br
.br
.BI "    NVME_LOG_ST_MAX_RESULTS"
, 
.br
.br
.BI "    NVME_LOG_TELEM_BLOCK_SIZE"
, 
.br
.br
.BI "    NVME_LOG_FID_SUPPORTED_EFFECTS_MAX"
, 
.br
.br
.BI "    NVME_LOG_MI_CMD_SUPPORTED_EFFECTS_MAX"
, 
.br
.br
.BI "    NVME_LOG_MI_CMD_SUPPORTED_EFFECTS_RESERVED"
, 
.br
.br
.BI "    NVME_DSM_MAX_RANGES"
, 
.br
.br
.BI "    NVME_NQN_LENGTH"
, 
.br
.br
.BI "    NVMF_TRADDR_SIZE"
, 
.br
.br
.BI "    NVMF_TSAS_SIZE"
, 
.br
.br
.BI "    NVME_ZNS_CHANGED_ZONES_MAX"
, 
.br
.br
.BI "    NVME_STREAM_ID_MAX"
, 
.br
.br
.BI "    NVME_UNDERLYING_NS_LIST_MAX"

};
.SH Constants
.IP "NVME_NSID_ALL" 12
A broadcast value that is used to specify all
namespaces
.IP "NVME_NSID_NONE" 12
The invalid namespace id, for when the nsid
parameter is not used in a command
.IP "NVME_UUID_NONE" 12
Use to omit a uuid command parameter
.IP "NVME_CNTLID_NONE" 12
Use to omit a cntlid command parameter
.IP "NVME_CNSSPECID_NONE" 12
Use to omit a cns_specific_id command parameter
.IP "NVME_LOG_LSP_NONE" 12
Use to omit a log lsp command parameter
.IP "NVME_LOG_LSI_NONE" 12
Use to omit a log lsi command parameter
.IP "NVME_LOG_LPO_NONE" 12
Use to omit a log lpo command parameter
.IP "NVME_IDENTIFY_DATA_SIZE" 12
The transfer size for nvme identify commands
.IP "NVME_LOG_SUPPORTED_LOG_PAGES_MAX" 12
The largest possible index in the supported
log pages log.
.IP "NVME_ID_NVMSET_LIST_MAX" 12
The largest possible nvmset index in identify
nvmeset
.IP "NVME_ID_UUID_LIST_MAX" 12
The largest possible uuid index in identify
uuid list
.IP "NVME_ID_CTRL_LIST_MAX" 12
The largest possible controller index in
identify controller list
.IP "NVME_ID_NS_LIST_MAX" 12
The largest possible namespace index in
identify namespace list
.IP "NVME_ID_SECONDARY_CTRL_MAX" 12
The largest possible secondary controller index
in identify secondary controller
.IP "NVME_ID_DOMAIN_LIST_MAX" 12
The largest possible domain index in the
in domain list
.IP "NVME_ID_ENDURANCE_GROUP_LIST_MAX" 12
The largest possible endurance group
index in the endurance group list
.IP "NVME_ID_ND_DESCRIPTOR_MAX" 12
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)
.IP "NVME_FEAT_LBA_RANGE_MAX" 12
The largest possible LBA range index in feature
lba range type
.IP "NVME_LOG_ST_MAX_RESULTS" 12
The largest possible self test result index in the
device self test log
.IP "NVME_LOG_TELEM_BLOCK_SIZE" 12
Specification defined size of Telemetry Data Blocks
.IP "NVME_LOG_FID_SUPPORTED_EFFECTS_MAX" 12
The largest possible FID index in the
feature identifiers effects log.
.IP "NVME_LOG_MI_CMD_SUPPORTED_EFFECTS_MAX" 12
The largest possible MI Command index
in the MI Command effects log.
.IP "NVME_LOG_MI_CMD_SUPPORTED_EFFECTS_RESERVED" 12
The reserved space in the MI Command
effects log.
.IP "NVME_DSM_MAX_RANGES" 12
The largest possible range index in a data-set
management command
.IP "NVME_NQN_LENGTH" 12
Max length for NVMe Qualified Name
.IP "NVMF_TRADDR_SIZE" 12
Max Transport Address size
.IP "NVMF_TSAS_SIZE" 12
Max Transport Specific Address Subtype size
.IP "NVME_ZNS_CHANGED_ZONES_MAX" 12
Max number of zones in the changed zones log
page
.IP "NVME_STREAM_ID_MAX" 12
Max number of stream IDs
.IP "NVME_UNDERLYING_NS_LIST_MAX" 12
The maximum number of Underlying Namespace
Entry data structures reportable in the Get
Underlying Namespace List Identify data
structure