API¶

This part of the documentation lists the full API reference of all public classes and functions.

types.h

NVMe standard definitions

NVME_GET¶

NVME_GET (value, name)

extract field from complex value

Parameters

value: The original value of a complex field
name: The name of the sub-field within an nvme value

Description

By convention, this library defines _SHIFT and _MASK such that mask can be applied after the shift to isolate a specific set of bits that decode to a sub-field.

Return

The ‘name’ field from ‘value’

NVME_SET¶

NVME_SET (value, name)

set field into complex value

Parameters

value: The value to be set in its completed position
name: The name of the sub-field within an nvme value

Return

The ‘name’ field from ‘value’

enum nvme_constants¶: A place to stash various constant nvme values

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
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

enum nvme_csi¶: Defined command set indicators

Constants

NVME_CSI_NVM: NVM Command Set Indicator
NVME_CSI_KV: Key Value Command Set
NVME_CSI_ZNS: Zoned Namespace Command Set

enum nvme_register_offsets¶: controller registers for all transports. This is the layout of BAR0/1 for PCIe, and properties for fabrics.

Constants

NVME_REG_CAP: Controller Capabilities
NVME_REG_VS: Version
NVME_REG_INTMS: Interrupt Mask Set
NVME_REG_INTMC: Interrupt Mask Clear
NVME_REG_CC: Controller Configuration
NVME_REG_CSTS: Controller Status
NVME_REG_NSSR: NVM Subsystem Reset
NVME_REG_AQA: Admin Queue Attributes
NVME_REG_ASQ: Admin SQ Base Address
NVME_REG_ACQ: Admin CQ Base Address
NVME_REG_CMBLOC: Controller Memory Buffer Location
NVME_REG_CMBSZ: Controller Memory Buffer Size
NVME_REG_BPINFO: Boot Partition Information
NVME_REG_BPRSEL: Boot Partition Read Select
NVME_REG_BPMBL: Boot Partition Memory Buffer Location
NVME_REG_CMBMSC: Controller Memory Buffer Memory Space Control
NVME_REG_CMBSTS: Controller Memory Buffer Status
NVME_REG_CRTO: Controller Ready Timeouts
NVME_REG_PMRCAP: Persistent Memory Capabilities
NVME_REG_PMRCTL: Persistent Memory Region Control
NVME_REG_PMRSTS: Persistent Memory Region Status
NVME_REG_PMREBS: Persistent Memory Region Elasticity Buffer Size
NVME_REG_PMRSWTP: Memory Region Sustained Write Throughput
NVME_REG_PMRMSCL: Persistent Memory Region Controller Memory Space Control Lower
NVME_REG_PMRMSCU: Persistent Memory Region Controller Memory Space Control Upper

bool nvme_is_64bit_reg(__u32 offset)¶: Checks if offset of the controller register is a know 64bit value.

Parameters

__u32 offset: Offset of controller register field in bytes

Description

This function does not care about transport so that the offset is not going to be checked inside of this function for the unsupported fields in a specific transport. For example, BPMBL(Boot Partition Memory Buffer Location) register is not supported by fabrics, but it can be checked here.

Return

true if given offset is 64bit register, otherwise it returns false.

__u64 nvme_cmb_size(__u32 cmbsz)¶: Calculate size of the controller memory buffer

Parameters

__u32 cmbsz: Value from controller register NVME_REG_CMBSZ

Return

size of controller memory buffer in bytes

__u64 nvme_pmr_size(__u32 pmrebs)¶: Calculate size of persistent memory region elasticity buffer

Parameters

__u32 pmrebs: Value from controller register NVME_REG_PMREBS

Return

size of controller persistent memory buffer in bytes

__u64 nvme_pmr_throughput(__u32 pmrswtp)¶: Calculate throughput of persistent memory buffer

Parameters

__u32 pmrswtp: Value from controller register NVME_REG_PMRSWTP

Return

throughput of controller persistent memory buffer in bytes/second

enum nvme_psd_flags¶: Possible flag values in nvme power state descriptor

Constants

NVME_PSD_FLAGS_MXPS: Indicates the scale for the Maximum Power field. If this bit is cleared, then the scale of the Maximum Power field is in 0.01 Watts. If this bit is set, then the scale of the Maximum Power field is in 0.0001 Watts.
NVME_PSD_FLAGS_NOPS: Indicates whether the controller processes I/O commands in this power state. If this bit is cleared, then the controller processes I/O commands in this power state. If this bit is set, then the controller does not process I/O commands in this power state.

enum nvme_psd_ps¶: Known values for struct nvme_psd ips and aps. Use with nvme_psd_power_scale() to extract the power scale field to match this enum.

Constants

NVME_PSD_PS_NOT_REPORTED: Not reported
NVME_PSD_PS_100_MICRO_WATT: 0.0001 watt scale
NVME_PSD_PS_10_MILLI_WATT: 0.01 watt scale

unsigned int nvme_psd_power_scale(__u8 ps)¶: power scale occupies the upper 3 bits

Parameters

__u8 ps: power scale value

Return

power scale value

enum nvme_psd_workload¶: Specifies a workload hint in the Power Management Feature (see struct nvme_psd.apw) to inform the NVM subsystem or indicate the conditions for the active power level.

Constants

NVME_PSD_WORKLOAD_NP: The workload is unknown or not provided.
NVME_PSD_WORKLOAD_1: Extended Idle Period with a Burst of Random Write consists of five minutes of idle followed by thirty-two random write commands of size 1 MiB submitted to a single controller while all other controllers in the NVM subsystem are idle, and then thirty (30) seconds of idle.
NVME_PSD_WORKLOAD_2: Heavy Sequential Writes consists of 80,000 sequential write commands of size 128 KiB submitted to a single controller while all other controllers in the NVM subsystem are idle. The submission queue(s) should be sufficiently large allowing the host to ensure there are multiple commands pending at all times during the workload.

struct nvme_id_psd¶: Power Management data structure

Definition

struct nvme_id_psd {
  __le16 mp;
  __u8 rsvd2;
  __u8 flags;
  __le32 enlat;
  __le32 exlat;
  __u8 rrt;
  __u8 rrl;
  __u8 rwt;
  __u8 rwl;
  __le16 idlp;
  __u8 ips;
  __u8 rsvd19;
  __le16 actp;
  __u8 apws;
  __u8 rsvd23[9];
};

Members

mp: Maximum Power indicates the sustained maximum power consumed by the NVM subsystem in this power state. The power in Watts is equal to the value in this field multiplied by the scale specified in the Max Power Scale bit (see enum nvme_psd_flags). A value of 0 indicates Maximum Power is not reported.
rsvd2: Reserved
flags: Additional decoding flags, see enum nvme_psd_flags.
enlat: Entry Latency indicates the maximum latency in microseconds associated with entering this power state. A value of 0 indicates Entry Latency is not reported.
exlat: Exit Latency indicates the maximum latency in microseconds associated with exiting this power state. A value of 0 indicates Exit Latency is not reported.
rrt: Relative Read Throughput indicates the read throughput rank associated with this power state relative to others. The value in this is less than the number of supported power states.
rrl: Relative Read Latency indicates the read latency rank associated with this power state relative to others. The value in this field is less than the number of supported power states.
rwt: Relative Write Throughput indicates write throughput rank associated with this power state relative to others. The value in this field is less than the number of supported power states
rwl: Relative Write Latency indicates the write latency rank associated with this power state relative to others. The value in this field is less than the number of supported power states
idlp: Idle Power indicates the typical power consumed by the NVM subsystem over 30 seconds in this power state when idle.
ips: Idle Power Scale indicates the scale for struct nvme_id_psd.idlp, see enum nvme_psd_ps for decoding this field.
rsvd19: Reserved
actp: Active Power indicates the largest average power consumed by the NVM subsystem over a 10 second period in this power state with the workload indicated in the Active Power Workload field.
apws: Bits 7-6: Active Power Scale(APS) indicates the scale for the struct nvme_id_psd.actp, see enum nvme_psd_ps for decoding this value. Bits 2-0: Active Power Workload(APW) indicates the workload used to calculate maximum power for this power state. See enum nvme_psd_workload for decoding this field.
rsvd23: Reserved

struct nvme_id_ctrl¶: Identify Controller data structure

Definition

struct nvme_id_ctrl {
  __le16 vid;
  __le16 ssvid;
  char sn[20];
  char mn[40];
  char fr[8];
  __u8 rab;
  __u8 ieee[3];
  __u8 cmic;
  __u8 mdts;
  __le16 cntlid;
  __le32 ver;
  __le32 rtd3r;
  __le32 rtd3e;
  __le32 oaes;
  __le32 ctratt;
  __le16 rrls;
  __u8 rsvd102[9];
  __u8 cntrltype;
  __u8 fguid[16];
  __le16 crdt1;
  __le16 crdt2;
  __le16 crdt3;
  __u8 rsvd134[119];
  __u8 nvmsr;
  __u8 vwci;
  __u8 mec;
  __le16 oacs;
  __u8 acl;
  __u8 aerl;
  __u8 frmw;
  __u8 lpa;
  __u8 elpe;
  __u8 npss;
  __u8 avscc;
  __u8 apsta;
  __le16 wctemp;
  __le16 cctemp;
  __le16 mtfa;
  __le32 hmpre;
  __le32 hmmin;
  __u8 tnvmcap[16];
  __u8 unvmcap[16];
  __le32 rpmbs;
  __le16 edstt;
  __u8 dsto;
  __u8 fwug;
  __le16 kas;
  __le16 hctma;
  __le16 mntmt;
  __le16 mxtmt;
  __le32 sanicap;
  __le32 hmminds;
  __le16 hmmaxd;
  __le16 nsetidmax;
  __le16 endgidmax;
  __u8 anatt;
  __u8 anacap;
  __le32 anagrpmax;
  __le32 nanagrpid;
  __le32 pels;
  __le16 domainid;
  __u8 rsvd358[10];
  __u8 megcap[16];
  __u8 rsvd384[128];
  __u8 sqes;
  __u8 cqes;
  __le16 maxcmd;
  __le32 nn;
  __le16 oncs;
  __le16 fuses;
  __u8 fna;
  __u8 vwc;
  __le16 awun;
  __le16 awupf;
  __u8 icsvscc;
  __u8 nwpc;
  __le16 acwu;
  __le16 ocfs;
  __le32 sgls;
  __le32 mnan;
  __u8 maxdna[16];
  __le32 maxcna;
  __u8 rsvd564[204];
  char subnqn[NVME_NQN_LENGTH];
  __u8 rsvd1024[768];
  __le32 ioccsz;
  __le32 iorcsz;
  __le16 icdoff;
  __u8 fcatt;
  __u8 msdbd;
  __le16 ofcs;
  __u8 dctype;
  __u8 rsvd1807[241];
  struct nvme_id_psd      psd[32];
  __u8 vs[1024];
};

Members

vid: PCI Vendor ID, the company vendor identifier that is assigned by the PCI SIG.
ssvid: PCI Subsystem Vendor ID, the company vendor identifier that is assigned by the PCI SIG for the subsystem.
sn: Serial Number in ASCII
mn: Model Number in ASCII
fr: Firmware Revision in ASCII, the currently active firmware revision for the NVM subsystem
rab: Recommended Arbitration Burst, reported as a power of two
ieee: IEEE assigned Organization Unique Identifier
cmic: Controller Multipath IO and Namespace Sharing Capabilities of the controller and NVM subsystem. See enum nvme_id_ctrl_cmic.
mdts: Max Data Transfer Size is the largest data transfer size. The host should not submit a command that exceeds this maximum data transfer size. The value is in units of the minimum memory page size (CAP.MPSMIN) and is reported as a power of two
cntlid: Controller ID, the NVM subsystem unique controller identifier associated with the controller.
ver: Version, this field contains the value reported in the Version register, or property (see enum nvme_registers NVME_REG_VS).
rtd3r: RTD3 Resume Latency, the expected latency in microseconds to resume from Runtime D3
rtd3e: RTD3 Exit Latency, the typical latency in microseconds to enter Runtime D3.
oaes: Optional Async Events Supported, see enum nvme_id_ctrl_oaes.
ctratt: Controller Attributes, see enum nvme_id_ctrl_ctratt.
rrls: Read Recovery Levels. If a bit is set, then the corresponding Read Recovery Level is supported. If a bit is cleared, then the corresponding Read Recovery Level is not supported.
rsvd102: Reserved
cntrltype: Controller Type, see enum nvme_id_ctrl_cntrltype
fguid: FRU GUID, a 128-bit value that is globally unique for a given Field Replaceable Unit
crdt1: Controller Retry Delay time in 100 millisecond units if CQE CRD field is 1
crdt2: Controller Retry Delay time in 100 millisecond units if CQE CRD field is 2
crdt3: Controller Retry Delay time in 100 millisecond units if CQE CRD field is 3
rsvd134: Reserved
nvmsr: NVM Subsystem Report, see enum nvme_id_ctrl_nvmsr
vwci: VPD Write Cycle Information, see enum nvme_id_ctrl_vwci
mec: Management Endpoint Capabilities, see enum nvme_id_ctrl_mec
oacs: Optional Admin Command Support,the optional Admin commands and features supported by the controller, see enum nvme_id_ctrl_oacs.
acl: Abort Command Limit, the maximum number of concurrently executing Abort commands supported by the controller. This is a 0’s based value.
aerl: Async Event Request Limit, the maximum number of concurrently outstanding Asynchronous Event Request commands supported by the controller This is a 0’s based value.
frmw: Firmware Updates indicates capabilities regarding firmware updates. See enum nvme_id_ctrl_frmw.
lpa: Log Page Attributes, see enum nvme_id_ctrl_lpa.
elpe: Error Log Page Entries, the maximum number of Error Information log entries that are stored by the controller. This field is a 0’s based value.
npss: Number of Power States Supported, the number of NVM Express power states supported by the controller, indicating the number of valid entries in struct nvme_id_ctrl.psd. This is a 0’s based value.
avscc: Admin Vendor Specific Command Configuration, see enum nvme_id_ctrl_avscc.
apsta: Autonomous Power State Transition Attributes, see enum nvme_id_ctrl_apsta.
wctemp: Warning Composite Temperature Threshold indicates the minimum Composite Temperature field value (see struct nvme_smart_log.critical_comp_time) that indicates an overheating condition during which controller operation continues.
cctemp: Critical Composite Temperature Threshold, field indicates the minimum Composite Temperature field value (see struct nvme_smart_log.critical_comp_time) that indicates a critical overheating condition.
mtfa: Maximum Time for Firmware Activation indicates the maximum time the controller temporarily stops processing commands to activate the firmware image, specified in 100 millisecond units. This field is always valid if the controller supports firmware activation without a reset.
hmpre: Host Memory Buffer Preferred Size indicates the preferred size that the host is requested to allocate for the Host Memory Buffer feature in 4 KiB units.
hmmin: Host Memory Buffer Minimum Size indicates the minimum size that the host is requested to allocate for the Host Memory Buffer feature in 4 KiB units.
tnvmcap: Total NVM Capacity, the total NVM capacity in the NVM subsystem. The value is in bytes.
unvmcap: Unallocated NVM Capacity, the unallocated NVM capacity in the NVM subsystem. The value is in bytes.
rpmbs: Replay Protected Memory Block Support, see enum nvme_id_ctrl_rpmbs.
edstt: Extended Device Self-test Time, if Device Self-test command is supported (see struct nvme_id_ctrl.oacs, NVME_CTRL_OACS_SELF_TEST), then this field indicates the nominal amount of time in one minute units that the controller takes to complete an extended device self-test operation when in power state 0.
dsto: Device Self-test Options, see enum nvme_id_ctrl_dsto.
fwug: Firmware Update Granularity indicates the granularity and alignment requirement of the firmware image being updated by the Firmware Image Download command. The value is reported in 4 KiB units. A value of 0h indicates no information on granularity is provided. A value of FFh indicates no restriction
kas: Keep Alive Support indicates the granularity of the Keep Alive Timer in 100 millisecond units.
hctma: Host Controlled Thermal Management Attributes, see enum nvme_id_ctrl_hctm.
mntmt: Minimum Thermal Management Temperature indicates the minimum temperature, in degrees Kelvin, that the host may request in the Thermal Management Temperature 1 field and Thermal Management Temperature 2 field of a Set Features command with the Feature Identifier field set to NVME_FEAT_FID_HCTM.
mxtmt: Maximum Thermal Management Temperature indicates the maximum temperature, in degrees Kelvin, that the host may request in the Thermal Management Temperature 1 field and Thermal Management Temperature 2 field of the Set Features command with the Feature Identifier set to NVME_FEAT_FID_HCTM.
sanicap: Sanitize Capabilities, see enum nvme_id_ctrl_sanicap
hmminds: Host Memory Buffer Minimum Descriptor Entry Size indicates the minimum usable size of a Host Memory Buffer Descriptor Entry in 4 KiB units.
hmmaxd: Host Memory Maximum Descriptors Entries indicates the number of usable Host Memory Buffer Descriptor Entries.
nsetidmax: NVM Set Identifier Maximum, defines the maximum value of a valid NVM Set Identifier for any controller in the NVM subsystem.
endgidmax: Endurance Group Identifier Maximum, defines the maximum value of a valid Endurance Group Identifier for any controller in the NVM subsystem.
anatt: ANA Transition Time indicates the maximum amount of time, in seconds, for a transition between ANA states or the maximum amount of time, in seconds, that the controller reports the ANA change state.
anacap: Asymmetric Namespace Access Capabilities, see enum nvme_id_ctrl_anacap.
anagrpmax: ANA Group Identifier Maximum indicates the maximum value of a valid ANA Group Identifier for any controller in the NVM subsystem.
nanagrpid: Number of ANA Group Identifiers indicates the number of ANA groups supported by this controller.
pels: Persistent Event Log Size indicates the maximum reportable size for the Persistent Event Log.
domainid: Domain Identifier indicates the identifier of the domain that contains this controller.
rsvd358: Reserved
megcap: Max Endurance Group Capacity indicates the maximum capacity of a single Endurance Group.
rsvd384: Reserved
sqes: Submission Queue Entry Size, see enum nvme_id_ctrl_sqes.
cqes: Completion Queue Entry Size, see enum nvme_id_ctrl_cqes.
maxcmd: Maximum Outstanding Commands indicates the maximum number of commands that the controller processes at one time for a particular queue.
nn: Number of Namespaces indicates the maximum value of a valid nsid for the NVM subsystem. If the MNAN (struct nvme_id_ctrl.mnan field is cleared to 0h, then this field also indicates the maximum number of namespaces supported by the NVM subsystem.
oncs: Optional NVM Command Support, see enum nvme_id_ctrl_oncs.
fuses: Fused Operation Support, see enum nvme_id_ctrl_fuses.
fna: Format NVM Attributes, see enum nvme_id_ctrl_fna.
vwc: Volatile Write Cache, see enum nvme_id_ctrl_vwc.
awun: Atomic Write Unit Normal indicates the size of the write operation guaranteed to be written atomically to the NVM across all namespaces with any supported namespace format during normal operation. This field is specified in logical blocks and is a 0’s based value.
awupf: Atomic Write Unit Power Fail indicates the size of the write operation guaranteed to be written atomically to the NVM across all namespaces with any supported namespace format during a power fail or error condition. This field is specified in logical blocks and is a 0’s based value.
icsvscc: NVM Vendor Specific Command Configuration, see enum nvme_id_ctrl_nvscc.
nwpc: Namespace Write Protection Capabilities, see enum nvme_id_ctrl_nwpc.
acwu: Atomic Compare & Write Unit indicates the size of the write operation guaranteed to be written atomically to the NVM across all namespaces with any supported namespace format for a Compare and Write fused operation. This field is specified in logical blocks and is a 0’s based value.
ocfs: Optional Copy Formats Supported, each bit n means controller supports Copy Format n.
sgls: SGL Support, see enum nvme_id_ctrl_sgls
mnan: Maximum Number of Allowed Namespaces indicates the maximum number of namespaces supported by the NVM subsystem.
maxdna: Maximum Domain Namespace Attachments indicates the maximum of the sum of the number of namespaces attached to each I/O controller in the Domain.
maxcna: Maximum I/O Controller Namespace Attachments indicates the maximum number of namespaces that are allowed to be attached to this I/O controller.
rsvd564: Reserved
subnqn: NVM Subsystem NVMe Qualified Name, UTF-8 null terminated string
rsvd1024: Reserved
ioccsz: I/O Queue Command Capsule Supported Size, defines the maximum I/O command capsule size in 16 byte units.
iorcsz: I/O Queue Response Capsule Supported Size, defines the maximum I/O response capsule size in 16 byte units.
icdoff: In Capsule Data Offset, defines the offset where data starts within a capsule. This value is applicable to I/O Queues only.
fcatt: Fabrics Controller Attributes, see enum nvme_id_ctrl_fcatt.
msdbd: Maximum SGL Data Block Descriptors indicates the maximum number of SGL Data Block or Keyed SGL Data Block descriptors that a host is allowed to place in a capsule. A value of 0h indicates no limit.
ofcs: Optional Fabric Commands Support, see enum nvme_id_ctrl_ofcs.
dctype: Discovery Controller Type (DCTYPE). This field indicates what type of Discovery controller the controller is (see enum nvme_id_ctrl_dctype)
rsvd1807: Reserved
psd: Power State Descriptors, see struct nvme_id_psd.
vs: Vendor Specific

enum nvme_id_ctrl_cmic¶: Controller Multipath IO and Namespace Sharing Capabilities of the controller and NVM subsystem.

Constants

NVME_CTRL_CMIC_MULTI_PORT: If set, then the NVM subsystem may contain more than one NVM subsystem port, otherwise the NVM subsystem contains only a single NVM subsystem port.
NVME_CTRL_CMIC_MULTI_CTRL: If set, then the NVM subsystem may contain two or more controllers, otherwise the NVM subsystem contains only a single controller. An NVM subsystem that contains multiple controllers may be used by multiple hosts, or may provide multiple paths for a single host.
NVME_CTRL_CMIC_MULTI_SRIOV: If set, then the controller is associated with an SR-IOV Virtual Function, otherwise it is associated with a PCI Function or a Fabrics connection.
NVME_CTRL_CMIC_MULTI_ANA_REPORTING: If set, then the NVM subsystem supports Asymmetric Namespace Access Reporting.

enum nvme_id_ctrl_oaes¶: Optional Asynchronous Events Supported

Constants

NVME_CTRL_OAES_NA: Namespace Attribute Notices event supported
NVME_CTRL_OAES_FA: Firmware Activation Notices event supported
NVME_CTRL_OAES_ANA: ANA Change Notices supported
NVME_CTRL_OAES_PLEA: Predictable Latency Event Aggregate Log Change Notices event supported
NVME_CTRL_OAES_LBAS: LBA Status Information Notices event supported
NVME_CTRL_OAES_EGE: Endurance Group Events Aggregate Log Change Notices event supported
NVME_CTRL_OAES_NS: Normal NVM Subsystem Shutdown event supported
NVME_CTRL_OAES_ZD: Zone Descriptor Change Notifications supported
NVME_CTRL_OAES_DL: Discover Log Page Change Notifications supported

enum nvme_id_ctrl_ctratt¶: Controller attributes

Constants

NVME_CTRL_CTRATT_128_ID: 128-bit Host Identifier supported
NVME_CTRL_CTRATT_NON_OP_PSP: Non-Operational Poser State Permissive Mode supported
NVME_CTRL_CTRATT_NVM_SETS: NVM Sets supported
NVME_CTRL_CTRATT_READ_RECV_LVLS: Read Recovery Levels supported
NVME_CTRL_CTRATT_ENDURANCE_GROUPS: Endurance Groups supported
NVME_CTRL_CTRATT_PREDICTABLE_LAT: Predictable Latency Mode supported
NVME_CTRL_CTRATT_TBKAS: Traffic Based Keep Alive Support
NVME_CTRL_CTRATT_NAMESPACE_GRANULARITY: Namespace Granularity reporting supported
NVME_CTRL_CTRATT_SQ_ASSOCIATIONS: SQ Associations supported
NVME_CTRL_CTRATT_UUID_LIST: UUID List reporting supported
NVME_CTRL_CTRATT_MDS: Multi-Domain Subsystem supported
NVME_CTRL_CTRATT_FIXED_CAP: Fixed Capacity Management supported
NVME_CTRL_CTRATT_VARIABLE_CAP: Variable Capacity Management supported
NVME_CTRL_CTRATT_DEL_ENDURANCE_GROUPS: Delete Endurance Groups supported
NVME_CTRL_CTRATT_DEL_NVM_SETS: Delete NVM Sets supported
NVME_CTRL_CTRATT_ELBAS: Extended LBA Formats supported

enum nvme_id_ctrl_cntrltype¶: Controller types

Constants

NVME_CTRL_CNTRLTYPE_IO: NVM I/O controller
NVME_CTRL_CNTRLTYPE_DISCOVERY: Discovery controller
NVME_CTRL_CNTRLTYPE_ADMIN: Admin controller

enum nvme_id_ctrl_dctype¶: Discovery Controller types

Constants

NVME_CTRL_DCTYPE_NOT_REPORTED: Not reported (I/O, Admin, and pre-TP8010)
NVME_CTRL_DCTYPE_DDC: Direct Discovery controller
NVME_CTRL_DCTYPE_CDC: Central Discovery controller

enum nvme_id_ctrl_nvmsr¶: This field reports information associated with the NVM Subsystem, see struct nvme_id_ctrl.nvmsr.

Constants

NVME_CTRL_NVMSR_NVMESD: If set, then the NVM Subsystem is part of an NVMe Storage Device; if cleared, then the NVM Subsystem is not part of an NVMe Storage Device.
NVME_CTRL_NVMSR_NVMEE: If set’, then the NVM Subsystem is part of an NVMe Enclosure; if cleared, then the NVM Subsystem is not part of an NVMe Enclosure.

enum nvme_id_ctrl_vwci¶: This field indicates information about remaining number of times that VPD contents are able to be updated using the VPD Write command, see struct nvme_id_ctrl.vwci.

Constants

NVME_CTRL_VWCI_VWCR: Mask to get value of VPD Write Cycles Remaining. If the VPD Write Cycle Remaining Valid bit is set, then this field contains a value indicating the remaining number of times that VPD contents are able to be updated using the VPD Write command. If this field is set to 7Fh, then the remaining number of times that VPD contents are able to be updated using the VPD Write command is greater than or equal to 7Fh.
NVME_CTRL_VWCI_VWCRV: VPD Write Cycle Remaining Valid. If this bit is set, then the VPD Write Cycle Remaining field is valid. If this bit is cleared, then the VPD Write Cycles Remaining field is invalid and cleared to 0h.

enum nvme_id_ctrl_mec¶: Flags indicating the capabilities of the Management Endpoint in the Controller, struct nvme_id_ctrl.mec.

Constants

NVME_CTRL_MEC_SMBUSME: If set, then the NVM Subsystem contains a Management Endpoint on an SMBus/I2C port.
NVME_CTRL_MEC_PCIEME: If set, then the NVM Subsystem contains a Management Endpoint on a PCIe port.

enum nvme_id_ctrl_oacs¶: Flags indicating the optional Admin commands and features supported by the controller, see struct nvme_id_ctrl.oacs.

Constants

NVME_CTRL_OACS_SECURITY: If set, then the controller supports the Security Send and Security Receive commands.
NVME_CTRL_OACS_FORMAT: If set then the controller supports the Format NVM command.
NVME_CTRL_OACS_FW: If set, then the controller supports the Firmware Commit and Firmware Image Download commands.
NVME_CTRL_OACS_NS_MGMT: If set, then the controller supports the Namespace Management capability
NVME_CTRL_OACS_SELF_TEST: If set, then the controller supports the Device Self-test command.
NVME_CTRL_OACS_DIRECTIVES: If set, then the controller supports Directives and the Directive Send and Directive Receive commands.
NVME_CTRL_OACS_NVME_MI: If set, then the controller supports the NVMe-MI Send and NVMe-MI Receive commands.
NVME_CTRL_OACS_VIRT_MGMT: If set, then the controller supports the Virtualization Management command.
NVME_CTRL_OACS_DBBUF_CFG: If set, then the controller supports the Doorbell Buffer Config command.
NVME_CTRL_OACS_LBA_STATUS: If set, then the controller supports the Get LBA Status capability.
NVME_CTRL_OACS_CMD_FEAT_LD: If set, then the controller supports the command and feature lockdown capability.

enum nvme_id_ctrl_frmw¶: Flags and values indicates capabilities regarding firmware updates from struct nvme_id_ctrl.frmw.

Constants

NVME_CTRL_FRMW_1ST_RO: If set, the first firmware slot is readonly
NVME_CTRL_FRMW_NR_SLOTS: Mask to get the value of the number of firmware slots that the controller supports.
NVME_CTRL_FRMW_FW_ACT_NO_RESET: If set, the controller supports firmware activation without a reset.
NVME_CTRL_FRMW_MP_UP_DETECTION: If set, the controller is able to detect overlapping firmware/boot partition image update.

enum nvme_id_ctrl_lpa¶: Flags indicating optional attributes for log pages that are accessed via the Get Log Page command.

Constants

NVME_CTRL_LPA_SMART_PER_NS

If set, controller supports SMART/Health log page on a per namespace basis.

NVME_CTRL_LPA_CMD_EFFECTS

If Set, the controller supports the commands supported and effects log page.

NVME_CTRL_LPA_EXTENDED

If set, the controller supports extended data for log page command including extended number of dwords and log page offset fields.

NVME_CTRL_LPA_TELEMETRY

If set, the controller supports the telemetry host-initiated and telemetry controller-initiated log pages and sending telemetry log notices.

NVME_CTRL_LPA_PERSETENT_EVENT

If set, the controller supports persistent event log.

NVME_CTRL_LPA_LI0_LI5_LI12_LI13

If set, the controller supports - log pages log page. - returning scope of each command in

commands supported and effects log page.

feature identifiers supported and effects log page.
NVMe-MI commands supported and effects log page.

NVME_CTRL_LPA_DA4_TELEMETRY

If set, the controller supports data area 4 for telemetry host-initiated and telemetry.

enum nvme_id_ctrl_avscc¶: Flags indicating the configuration settings for Admin Vendor Specific command handling.

Constants

NVME_CTRL_AVSCC_AVS: If set, all Admin Vendor Specific Commands use the optional vendor specific command format with NDT and NDM fields.

enum nvme_id_ctrl_apsta¶: Flags indicating the attributes of the autonomous power state transition feature.

Constants

NVME_CTRL_APSTA_APST: If set, then the controller supports autonomous power state transitions.

enum nvme_id_ctrl_rpmbs¶: This field indicates if the controller supports one or more Replay Protected Memory Blocks, from struct nvme_id_ctrl.rpmbs.

Constants

NVME_CTRL_RPMBS_NR_UNITS: Mask to get the value of the Number of RPMB Units
NVME_CTRL_RPMBS_AUTH_METHOD: Mask to get the value of the Authentication Method
NVME_CTRL_RPMBS_TOTAL_SIZE: Mask to get the value of Total Size
NVME_CTRL_RPMBS_ACCESS_SIZE: Mask to get the value of Access Size

enum nvme_id_ctrl_dsto¶: Flags indicating the optional Device Self-test command or operation behaviors supported by the controller or NVM subsystem.

Constants

NVME_CTRL_DSTO_ONE_DST: If set, then the NVM subsystem supports only one device self-test operation in progress at a time.

enum nvme_id_ctrl_hctm¶: Flags indicate the attributes of the host controlled thermal management feature

Constants

NVME_CTRL_HCTMA_HCTM: then the controller supports host controlled thermal management, and the Set Features command and Get Features command with the Feature Identifier field set to NVME_FEAT_FID_HCTM.

enum nvme_id_ctrl_sanicap¶: Indicates attributes for sanitize operations.

Constants

NVME_CTRL_SANICAP_CES: Crypto Erase Support. If set, then the controller supports the Crypto Erase sanitize operation.
NVME_CTRL_SANICAP_BES: Block Erase Support. If set, then the controller supports the Block Erase sanitize operation.
NVME_CTRL_SANICAP_OWS: Overwrite Support. If set, then the controller supports the Overwrite sanitize operation.
NVME_CTRL_SANICAP_NDI: No-Deallocate Inhibited. If set and the No- Deallocate Response Mode bit is set, then the controller deallocates after the sanitize operation even if the No-Deallocate After Sanitize bit is set in a Sanitize command.
NVME_CTRL_SANICAP_NODMMAS: No-Deallocate Modifies Media After Sanitize, mask to extract value.

enum nvme_id_ctrl_anacap¶: This field indicates the capabilities associated with Asymmetric Namespace Access Reporting.

Constants

NVME_CTRL_ANACAP_OPT: If set, then the controller is able to report ANA Optimized state.
NVME_CTRL_ANACAP_NON_OPT: If set, then the controller is able to report ANA Non-Optimized state.
NVME_CTRL_ANACAP_INACCESSIBLE: If set, then the controller is able to report ANA Inaccessible state.
NVME_CTRL_ANACAP_PERSISTENT_LOSS: If set, then the controller is able to report ANA Persistent Loss state.
NVME_CTRL_ANACAP_CHANGE: If set, then the controller is able to report ANA Change state.
NVME_CTRL_ANACAP_GRPID_NO_CHG: If set, then the ANAGRPID field in the Identify Namespace data structure (struct nvme_id_ns.anagrpid), does not change while the namespace is attached to any controller.
NVME_CTRL_ANACAP_GRPID_MGMT: If set, then the controller supports a non-zero value in the ANAGRPID field of the Namespace Management command.

enum nvme_id_ctrl_sqes¶: Defines the required and maximum Submission Queue entry size when using the NVM Command Set.

Constants

NVME_CTRL_SQES_MIN: Mask to get the value of the required Submission Queue Entry size when using the NVM Command Set.
NVME_CTRL_SQES_MAX: Mask to get the value of the maximum Submission Queue entry size when using the NVM Command Set.

enum nvme_id_ctrl_cqes¶: Defines the required and maximum Completion Queue entry size when using the NVM Command Set.

Constants

NVME_CTRL_CQES_MIN: Mask to get the value of the required Completion Queue Entry size when using the NVM Command Set.
NVME_CTRL_CQES_MAX: Mask to get the value of the maximum Completion Queue entry size when using the NVM Command Set.

enum nvme_id_ctrl_oncs¶: This field indicates the optional NVM commands and features supported by the controller.

Constants

NVME_CTRL_ONCS_COMPARE: If set, then the controller supports the Compare command.
NVME_CTRL_ONCS_WRITE_UNCORRECTABLE: If set, then the controller supports the Write Uncorrectable command.
NVME_CTRL_ONCS_DSM: If set, then the controller supports the Dataset Management command.
NVME_CTRL_ONCS_WRITE_ZEROES: If set, then the controller supports the Write Zeroes command.
NVME_CTRL_ONCS_SAVE_FEATURES: If set, then the controller supports the Save field set to a non-zero value in the Set Features command and the Select field set to a non-zero value in the Get Features command.
NVME_CTRL_ONCS_RESERVATIONS: If set, then the controller supports reservations.
NVME_CTRL_ONCS_TIMESTAMP: If set, then the controller supports the Timestamp feature.
NVME_CTRL_ONCS_VERIFY: If set, then the controller supports the Verify command.
NVME_CTRL_ONCS_COPY: If set, then the controller supports the copy command.

enum nvme_id_ctrl_fuses¶: This field indicates the fused operations that the controller supports.

Constants

NVME_CTRL_FUSES_COMPARE_AND_WRITE: If set, then the controller supports the Compare and Write fused operation.

enum nvme_id_ctrl_fna¶: This field indicates attributes for the Format NVM command.

Constants

NVME_CTRL_FNA_FMT_ALL_NAMESPACES: If set, then all namespaces in an NVM subsystem shall be configured with the same attributes and a format (excluding secure erase) of any namespace results in a format of all namespaces in an NVM subsystem. If cleared, then the controller supports format on a per namespace basis.
NVME_CTRL_FNA_SEC_ALL_NAMESPACES: If set, then any secure erase performed as part of a format operation results in a secure erase of all namespaces in the NVM subsystem. If cleared, then any secure erase performed as part of a format results in a secure erase of the particular namespace specified.
NVME_CTRL_FNA_CRYPTO_ERASE: If set, then cryptographic erase is supported. If cleared, then cryptographic erase is not supported.
NVME_CTRL_FNA_NSID_FFFFFFFF: If set, then format does not support nsid value set to FFFFFFFFh. If cleared, format supports nsid value set to FFFFFFFFh.

enum nvme_id_ctrl_vwc¶: Volatile write cache

Constants

NVME_CTRL_VWC_PRESENT: If set, indicates a volatile write cache is present. If a volatile write cache is present, then the host controls whether the volatile write cache is enabled with a Set Features command specifying the value NVME_FEAT_FID_VOLATILE_WC.
NVME_CTRL_VWC_FLUSH: Mask to get the value of the flush command behavior.

enum nvme_id_ctrl_nvscc¶: This field indicates the configuration settings for NVM Vendor Specific command handling.

Constants

NVME_CTRL_NVSCC_FMT: If set, all NVM Vendor Specific Commands use the format with NDT and NDM fields.

enum nvme_id_ctrl_nwpc¶: This field indicates the optional namespace write protection capabilities supported by the controller.

Constants

NVME_CTRL_NWPC_WRITE_PROTECT: If set, then the controller shall support the No Write Protect and Write Protect namespace write protection states and may support the Write Protect Until Power Cycle state and Permanent Write Protect namespace write protection states.
NVME_CTRL_NWPC_WRITE_PROTECT_POWER_CYCLE: If set, then the controller supports the Write Protect Until Power Cycle state.
NVME_CTRL_NWPC_WRITE_PROTECT_PERMANENT: If set, then the controller supports the Permanent Write Protect state.

enum nvme_id_ctrl_sgls¶: This field indicates if SGLs are supported for the NVM Command Set and the particular SGL types supported.

Constants

NVME_CTRL_SGLS_SUPPORTED

NVME_CTRL_SGLS_KEYED

NVME_CTRL_SGLS_BIT_BUCKET

NVME_CTRL_SGLS_MPTR_BYTE_ALIGNED

NVME_CTRL_SGLS_OVERSIZE

NVME_CTRL_SGLS_MPTR_SGL

NVME_CTRL_SGLS_OFFSET

NVME_CTRL_SGLS_TPORT

enum nvme_id_ctrl_fcatt¶: This field indicates attributes of the controller that are specific to NVMe over Fabrics.

Constants

NVME_CTRL_FCATT_DYNAMIC: If cleared, then the NVM subsystem uses a dynamic controller model. If set, then the NVM subsystem uses a static controller model.

enum nvme_id_ctrl_ofcs¶: Indicate whether the controller supports optional fabric commands.

Constants

NVME_CTRL_OFCS_DISCONNECT: If set, then the controller supports the Disconnect command and deletion of individual I/O Queues.

struct nvme_lbaf¶: LBA Format Data Structure

Definition

struct nvme_lbaf {
  __le16 ms;
  __u8 ds;
  __u8 rp;
};

Members

ms: Metadata Size indicates the number of metadata bytes provided per LBA based on the LBA Data Size indicated.
ds: LBA Data Size indicates the LBA data size supported, reported as a power of two.
rp: Relative Performance, see enum nvme_lbaf_rp.

enum nvme_lbaf_rp¶: This field indicates the relative performance of the LBA format indicated relative to other LBA formats supported by the controller.

Constants

NVME_LBAF_RP_BEST: Best performance
NVME_LBAF_RP_BETTER: Better performance
NVME_LBAF_RP_GOOD: Good performance
NVME_LBAF_RP_DEGRADED: Degraded performance
NVME_LBAF_RP_MASK: Mask to get the relative performance value from the field

struct nvme_id_ns¶: Identify Namespace data structure

Definition

struct nvme_id_ns {
  __le64 nsze;
  __le64 ncap;
  __le64 nuse;
  __u8 nsfeat;
  __u8 nlbaf;
  __u8 flbas;
  __u8 mc;
  __u8 dpc;
  __u8 dps;
  __u8 nmic;
  __u8 rescap;
  __u8 fpi;
  __u8 dlfeat;
  __le16 nawun;
  __le16 nawupf;
  __le16 nacwu;
  __le16 nabsn;
  __le16 nabo;
  __le16 nabspf;
  __le16 noiob;
  __u8 nvmcap[16];
  __le16 npwg;
  __le16 npwa;
  __le16 npdg;
  __le16 npda;
  __le16 nows;
  __le16 mssrl;
  __le32 mcl;
  __u8 msrc;
  __u8 rsvd81;
  __u8 nulbaf;
  __u8 rsvd83[9];
  __le32 anagrpid;
  __u8 rsvd96[3];
  __u8 nsattr;
  __le16 nvmsetid;
  __le16 endgid;
  __u8 nguid[16];
  __u8 eui64[8];
  struct nvme_lbaf        lbaf[64];
  __le64 lbstm;
  __u8 vs[3704];
};

Members

nsze: Namespace Size indicates the total size of the namespace in logical blocks. The number of logical blocks is based on the formatted LBA size.
ncap: Namespace Capacity indicates the maximum number of logical blocks that may be allocated in the namespace at any point in time. The number of logical blocks is based on the formatted LBA size.
nuse: Namespace Utilization indicates the current number of logical blocks allocated in the namespace. This field is smaller than or equal to the Namespace Capacity. The number of logical blocks is based on the formatted LBA size.
nsfeat: Namespace Features, see enum nvme_id_nsfeat.
nlbaf: Number of LBA Formats defines the number of supported LBA data size and metadata size combinations supported by the namespace and the highest possible index to struct nvme_id_ns.lbaf.
flbas: Formatted LBA Size, see enum nvme_id_ns_flbas.
mc: Metadata Capabilities, see enum nvme_id_ns_mc.
dpc: End-to-end Data Protection Capabilities, see enum nvme_id_ns_dpc.
dps: End-to-end Data Protection Type Settings, see enum nvme_id_ns_dps.
nmic: Namespace Multi-path I/O and Namespace Sharing Capabilities, see enum nvme_id_ns_nmic.
rescap: Reservation Capabilities, see enum nvme_id_ns_rescap.
fpi: Format Progress Indicator, see enum nvme_nd_ns_fpi.
dlfeat: Deallocate Logical Block Features, see enum nvme_id_ns_dlfeat.
nawun: Namespace Atomic Write Unit Normal indicates the namespace specific size of the write operation guaranteed to be written atomically to the NVM during normal operation.
nawupf: Namespace Atomic Write Unit Power Fail indicates the namespace specific size of the write operation guaranteed to be written atomically to the NVM during a power fail or error condition.
nacwu: Namespace Atomic Compare & Write Unit indicates the namespace specific size of the write operation guaranteed to be written atomically to the NVM for a Compare and Write fused command.
nabsn: Namespace Atomic Boundary Size Normal indicates the atomic boundary size for this namespace for the NAWUN value. This field is specified in logical blocks.
nabo: Namespace Atomic Boundary Offset indicates the LBA on this namespace where the first atomic boundary starts.
nabspf: Namespace Atomic Boundary Size Power Fail indicates the atomic boundary size for this namespace specific to the Namespace Atomic Write Unit Power Fail value. This field is specified in logical blocks.
noiob: Namespace Optimal I/O Boundary indicates the optimal I/O boundary for this namespace. This field is specified in logical blocks. The host should construct Read and Write commands that do not cross the I/O boundary to achieve optimal performance.
nvmcap: NVM Capacity indicates the total size of the NVM allocated to this namespace. The value is in bytes.
npwg: Namespace Preferred Write Granularity indicates the smallest recommended write granularity in logical blocks for this namespace. This is a 0’s based value.
npwa: Namespace Preferred Write Alignment indicates the recommended write alignment in logical blocks for this namespace. This is a 0’s based value.
npdg: Namespace Preferred Deallocate Granularity indicates the recommended granularity in logical blocks for the Dataset Management command with the Attribute - Deallocate bit.
npda: Namespace Preferred Deallocate Alignment indicates the recommended alignment in logical blocks for the Dataset Management command with the Attribute - Deallocate bit
nows: Namespace Optimal Write Size indicates the size in logical blocks for optimal write performance for this namespace. This is a 0’s based value.
mssrl: Maximum Single Source Range Length indicates the maximum number of logical blocks that may be specified in each valid Source Range field of a Copy command.
mcl: Maximum Copy Length indicates the maximum number of logical blocks that may be specified in a Copy command.
msrc: Maximum Source Range Count indicates the maximum number of Source Range entries that may be used to specify source data in a Copy command. This is a 0’s based value.
rsvd81: Reserved
nulbaf: Number of Unique Capability LBA Formats defines the number of supported user data size and metadata size combinations supported by the namespace that may not share the same capabilities. LBA formats shall be allocated in order and packed sequentially.
rsvd83: Reserved
anagrpid: ANA Group Identifier indicates the ANA Group Identifier of the ANA group of which the namespace is a member.
rsvd96: Reserved
nsattr: Namespace Attributes, see enum nvme_id_ns_attr.
nvmsetid: NVM Set Identifier indicates the NVM Set with which this namespace is associated.
endgid: Endurance Group Identifier indicates the Endurance Group with which this namespace is associated.
nguid: Namespace Globally Unique Identifier contains a 128-bit value that is globally unique and assigned to the namespace when the namespace is created. This field remains fixed throughout the life of the namespace and is preserved across namespace and controller operations
eui64: IEEE Extended Unique Identifier contains a 64-bit IEEE Extended Unique Identifier (EUI-64) that is globally unique and assigned to the namespace when the namespace is created. This field remains fixed throughout the life of the namespace and is preserved across namespace and controller operations
lbaf: LBA Format, see struct nvme_lbaf.
lbstm: Logical Block Storage Tag Mask for end-to-end protection
vs: Vendor Specific

enum nvme_id_nsfeat¶: This field defines features of the namespace.

Constants

NVME_NS_FEAT_THIN: If set, indicates that the namespace supports thin provisioning. Specifically, the Namespace Capacity reported may be less than the Namespace Size.
NVME_NS_FEAT_NATOMIC: If set, indicates that the fields NAWUN, NAWUPF, and NACWU are defined for this namespace and should be used by the host for this namespace instead of the AWUN, AWUPF, and ACWU fields in the Identify Controller data structure.
NVME_NS_FEAT_DULBE: If set, indicates that the controller supports the Deallocated or Unwritten Logical Block error for this namespace.
NVME_NS_FEAT_ID_REUSE: If set, indicates that the value in the NGUID field for this namespace, if non- zero, is never reused by the controller and that the value in the EUI64 field for this namespace, if non-zero, is never reused by the controller.
NVME_NS_FEAT_IO_OPT: If set, indicates that the fields NPWG, NPWA, NPDG, NPDA, and NOWS are defined for this namespace and should be used by the host for I/O optimization

enum nvme_id_ns_flbas¶: This field indicates the LBA data size & metadata size combination that the namespace has been formatted with

Constants

NVME_NS_FLBAS_LOWER_MASK: Mask to get the index of one of the supported LBA Formats’s least significant 4bits indicated in struct nvme_id_ns.lbaf.
NVME_NS_FLBAS_META_EXT: Applicable only if format contains metadata. If this bit is set, indicates that the metadata is transferred at the end of the data LBA, creating an extended data LBA. If cleared, indicates that all of the metadata for a command is transferred as a separate contiguous buffer of data.
NVME_NS_FLBAS_HIGHER_MASK: Mask to get the index of one of the supported LBA Formats’s most significant 2bits indicated in struct nvme_id_ns.lbaf.

enum nvme_nvm_id_ns_elbaf¶: This field indicates the extended LBA format

Constants

NVME_NVM_ELBAF_STS_MASK: Mask to get the storage tag size used to determine the variable-sized storage tag/reference tag fields
NVME_NVM_ELBAF_PIF_MASK: Mask to get the protection information format for the extended LBA format.

enum nvme_id_ns_mc¶: This field indicates the capabilities for metadata.

Constants

NVME_NS_MC_EXTENDED: If set, indicates the namespace supports the metadata being transferred as part of a separate buffer that is specified in the Metadata Pointer.
NVME_NS_MC_SEPARATE: If set, indicates that the namespace supports the metadata being transferred as part of an extended data LBA.

enum nvme_id_ns_dpc¶: This field indicates the capabilities for the end-to-end data protection feature.

Constants

NVME_NS_DPC_PI_TYPE1: If set, indicates that the namespace supports Protection Information Type 1.
NVME_NS_DPC_PI_TYPE2: If set, indicates that the namespace supports Protection Information Type 2.
NVME_NS_DPC_PI_TYPE3: If set, indicates that the namespace supports Protection Information Type 3.
NVME_NS_DPC_PI_FIRST: If set, indicates that the namespace supports protection information transferred as the first eight bytes of metadata.
NVME_NS_DPC_PI_LAST: If set, indicates that the namespace supports protection information transferred as the last eight bytes of metadata.

enum nvme_id_ns_dps¶: This field indicates the Type settings for the end-to-end data protection feature.

Constants

NVME_NS_DPS_PI_NONE: Protection information is not enabled
NVME_NS_DPS_PI_TYPE1: Protection information is enabled, Type 1
NVME_NS_DPS_PI_TYPE2: Protection information is enabled, Type 2
NVME_NS_DPS_PI_TYPE3: Protection information is enabled, Type 3
NVME_NS_DPS_PI_MASK: Mask to get the value of the PI type
NVME_NS_DPS_PI_FIRST: If set, indicates that the protection information, if enabled, is transferred as the first eight bytes of metadata.

enum nvme_id_ns_nmic¶: This field specifies multi-path I/O and namespace sharing capabilities of the namespace.

Constants

NVME_NS_NMIC_SHARED: If set, then the namespace may be attached to two or more controllers in the NVM subsystem concurrently

enum nvme_id_ns_rescap¶: This field indicates the reservation capabilities of the namespace.

Constants

NVME_NS_RESCAP_PTPL: If set, indicates that the namespace supports the Persist Through Power Loss capability.
NVME_NS_RESCAP_WE: If set, indicates that the namespace supports the Write Exclusive reservation type.
NVME_NS_RESCAP_EA: If set, indicates that the namespace supports the Exclusive Access reservation type.
NVME_NS_RESCAP_WERO: If set, indicates that the namespace supports the Write Exclusive - Registrants Only reservation type.
NVME_NS_RESCAP_EARO: If set, indicates that the namespace supports the Exclusive Access - Registrants Only reservation type.
NVME_NS_RESCAP_WEAR: If set, indicates that the namespace supports the Write Exclusive - All Registrants reservation type.
NVME_NS_RESCAP_EAAR: If set, indicates that the namespace supports the Exclusive Access - All Registrants reservation type.
NVME_NS_RESCAP_IEK_13: If set, indicates that Ignore Existing Key is used as defined in revision 1.3 or later of this specification.

enum nvme_nd_ns_fpi¶: If a format operation is in progress, this field indicates the percentage of the namespace that remains to be formatted.

Constants

NVME_NS_FPI_REMAINING: Mask to get the format percent remaining value
NVME_NS_FPI_SUPPORTED: If set, indicates that the namespace supports the Format Progress Indicator defined for the field.

enum nvme_id_ns_dlfeat¶: This field indicates information about features that affect deallocating logical blocks for this namespace.

Constants

NVME_NS_DLFEAT_RB: Mask to get the value of the read behavior
NVME_NS_DLFEAT_RB_NR: Read behvaior is not reported
NVME_NS_DLFEAT_RB_ALL_0S: A deallocated logical block returns all bytes cleared to 0h.
NVME_NS_DLFEAT_RB_ALL_FS: A deallocated logical block returns all bytes set to FFh.
NVME_NS_DLFEAT_WRITE_ZEROES: If set, indicates that the controller supports the Deallocate bit in the Write Zeroes command for this namespace.
NVME_NS_DLFEAT_CRC_GUARD: If set, indicates that the Guard field for deallocated logical blocks that contain protection information is set to the CRC for the value read from the deallocated logical block and its metadata

enum nvme_id_ns_attr¶: Specifies attributes of the namespace.

Constants

NVME_NS_NSATTR_WRITE_PROTECTED: If set, then the namespace is currently write protected and all write access to the namespace shall fail.

struct nvme_ns_id_desc¶: Namespace identifier type descriptor

Definition

struct nvme_ns_id_desc {
  __u8 nidt;
  __u8 nidl;
  __le16 rsvd;
  __u8 nid[];
};

Members

nidt: Namespace Identifier Type, see enum nvme_ns_id_desc_nidt
nidl: Namespace Identifier Length contains the length in bytes of the struct nvme_id_ns.nid.
rsvd: Reserved
nid: Namespace Identifier contains a value that is globally unique and assigned to the namespace when the namespace is created. The length is defined in struct nvme_id_ns.nidl.

enum nvme_ns_id_desc_nidt¶: Known namespace identifier types

Constants

NVME_NIDT_EUI64: IEEE Extended Unique Identifier, the NID field contains a copy of the EUI64 field in the struct nvme_id_ns.eui64.
NVME_NIDT_NGUID: Namespace Globally Unique Identifier, the NID field contains a copy of the NGUID field in struct nvme_id_ns.nguid.
NVME_NIDT_UUID: The NID field contains a 128-bit Universally Unique Identifier (UUID) as specified in RFC 4122.
NVME_NIDT_CSI: The NID field contains the command set identifier.

struct nvme_nvmset_attr¶: NVM Set Attributes Entry

Definition

struct nvme_nvmset_attr {
  __le16 nvmsetid;
  __le16 endgid;
  __u8 rsvd4[4];
  __le32 rr4kt;
  __le32 ows;
  __u8 tnvmsetcap[16];
  __u8 unvmsetcap[16];
  __u8 rsvd48[80];
};

Members

nvmsetid: NVM Set Identifier
endgid: Endurance Group Identifier
rsvd4: Reserved
rr4kt: Random 4 KiB Read Typical indicates the typical time to complete a 4 KiB random read in 100 nanosecond units when the NVM Set is in a Predictable Latency Mode Deterministic Window and there is 1 outstanding command per NVM Set.
ows: Optimal Write Size
tnvmsetcap: Total NVM Set Capacity
unvmsetcap: Unallocated NVM Set Capacity
rsvd48: Reserved

struct nvme_id_nvmset_list¶: NVM set list

Definition

struct nvme_id_nvmset_list {
  __u8 nid;
  __u8 rsvd1[127];
  struct nvme_nvmset_attr ent[NVME_ID_NVMSET_LIST_MAX];
};

Members

nid: Nvmset id
rsvd1: Reserved
ent: nvmset id list

struct nvme_id_independent_id_ns¶: Identify - I/O Command Set Independent Identify Namespace Data Structure

Definition

struct nvme_id_independent_id_ns {
  __u8 nsfeat;
  __u8 nmic;
  __u8 rescap;
  __u8 fpi;
  __le32 anagrpid;
  __u8 nsattr;
  __u8 rsvd9;
  __le16 nvmsetid;
  __le16 endgid;
  __u8 nstat;
  __u8 rsvd15[4081];
};

Members

nsfeat: common namespace features
nmic: Namespace Multi-path I/O and Namespace Sharing Capabilities
rescap: Reservation Capabilities
fpi: Format Progress Indicator
anagrpid: ANA Group Identifier
nsattr: Namespace Attributes
rsvd9: reserved
nvmsetid: NVM Set Identifier
endgid: Endurance Group Identifier
nstat: Namespace Status
rsvd15: reserved

struct nvme_id_ns_granularity_desc¶: Namespace Granularity Descriptor

Definition

struct nvme_id_ns_granularity_desc {
  __le64 nszegran;
  __le64 ncapgran;
};

Members

nszegran: Namespace Size Granularity
ncapgran: Namespace Capacity Granularity

struct nvme_id_ns_granularity_list¶: Namespace Granularity List

Definition

struct nvme_id_ns_granularity_list {
  __le32 attributes;
  __u8 num_descriptors;
  __u8 rsvd5[27];
  struct nvme_id_ns_granularity_desc entry[NVME_ID_ND_DESCRIPTOR_MAX];
  __u8 rsvd288[3808];
};

Members

attributes: Namespace Granularity Attributes
num_descriptors: Number of Descriptors
rsvd5: reserved
entry: Namespace Granularity Descriptor
rsvd288: reserved

struct nvme_id_uuid_list_entry¶: UUID List Entry

Definition

struct nvme_id_uuid_list_entry {
  __u8 header;
  __u8 rsvd1[15];
  __u8 uuid[16];
};

Members

header: UUID Lists Entry Header
rsvd1: reserved
uuid: 128-bit Universally Unique Identifier

enum nvme_id_uuid¶: Identifier Association

Constants

NVME_ID_UUID_HDR_ASSOCIATION_MASK

NVME_ID_UUID_ASSOCIATION_NONE

NVME_ID_UUID_ASSOCIATION_VENDOR

NVME_ID_UUID_ASSOCIATION_SUBSYSTEM_VENDOR

struct nvme_id_uuid_list¶: UUID list

Definition

struct nvme_id_uuid_list {
  __u8 rsvd0[32];
  struct nvme_id_uuid_list_entry entry[NVME_ID_UUID_LIST_MAX];
};

Members

rsvd0: reserved
entry: UUID list entry

struct nvme_ctrl_list¶: Controller List

Definition

struct nvme_ctrl_list {
  __le16 num;
  __le16 identifier[NVME_ID_CTRL_LIST_MAX];
};

Members

num: Number of Identifiers
identifier: NVM subsystem unique controller identifier

struct nvme_ns_list¶: Namespace List

Definition

struct nvme_ns_list {
  __le32 ns[NVME_ID_NS_LIST_MAX];
};

Members

ns: Namespace Identifier

struct nvme_id_ctrl_nvm¶: I/O Command Set Specific Identify Controller data structure

Definition

struct nvme_id_ctrl_nvm {
  __u8 vsl;
  __u8 wzsl;
  __u8 wusl;
  __u8 dmrl;
  __u32 dmrsl;
  __u64 dmsl;
  __u8 rsvd16[4080];
};

Members

vsl: Verify Size Limit
wzsl: Write Zeroes Size Limit
wusl: Write Uncorrectable Size Limit
dmrl: Dataset Management Ranges Limit
dmrsl: Dataset Management Range Size Limit
dmsl: Dataset Management Size Limit
rsvd16: reserved

struct nvme_nvm_id_ns¶: NVME Command Set I/O Command Set Specific Identify Namespace Data Structure

Definition

struct nvme_nvm_id_ns {
  __le64 lbstm;
  __u8 pic;
  __u8 rsvd9[3];
  __le32 elbaf[64];
  __u8 rsvd268[3828];
};

Members

lbstm: Logical Block Storage Tag Mask
pic: Protection Information Capabilities
rsvd9: Reserved
elbaf: List of Extended LBA Format Support
rsvd268: Reserved

struct nvme_zns_lbafe¶: LBA Format Extension Data Structure

Definition

struct nvme_zns_lbafe {
  __le64 zsze;
  __u8 zdes;
  __u8 rsvd9[7];
};

Members

zsze: Zone Size
zdes: Zone Descriptor Extension Size
rsvd9: reserved

struct nvme_zns_id_ns¶: Zoned Namespace Command Set Specific Identify Namespace Data Structure

Definition

struct nvme_zns_id_ns {
  __le16 zoc;
  __le16 ozcs;
  __le32 mar;
  __le32 mor;
  __le32 rrl;
  __le32 frl;
  __le32 rrl1;
  __le32 rrl2;
  __le32 rrl3;
  __le32 frl1;
  __le32 frl2;
  __le32 frl3;
  __le32 numzrwa;
  __le16 zrwafg;
  __le16 zrwasz;
  __u8 zrwacap;
  __u8 rsvd53[2763];
  struct nvme_zns_lbafe   lbafe[64];
  __u8 vs[256];
};

Members

zoc: Zone Operation Characteristics
ozcs: Optional Zoned Command Support
mar: Maximum Active Resources
mor: Maximum Open Resources
rrl: Reset Recommended Limit
frl: Finish Recommended Limit
rrl1: Reset Recommended Limit 1
rrl2: Reset Recommended Limit 2
rrl3: Reset Recommended Limit 3
frl1: Finish Recommended Limit 1
frl2: Finish Recommended Limit 2
frl3: Finish Recommended Limit 3
numzrwa: Number of ZRWA Resources
zrwafg: ZRWA Flush Granularity
zrwasz: ZRWA Size
zrwacap: ZRWA Capability
rsvd53: Reserved
lbafe: LBA Format Extension
vs: Vendor Specific

struct nvme_zns_id_ctrl¶: I/O Command Set Specific Identify Controller Data Structure for the Zoned Namespace Command Set

Definition

struct nvme_zns_id_ctrl {
  __u8 zasl;
  __u8 rsvd1[4095];
};

Members

zasl: Zone Append Size Limit
rsvd1: Reserved

struct nvme_primary_ctrl_cap¶: Identify - Controller Capabilities Structure

Definition

struct nvme_primary_ctrl_cap {
  __le16 cntlid;
  __le16 portid;
  __u8 crt;
  __u8 rsvd5[27];
  __le32 vqfrt;
  __le32 vqrfa;
  __le16 vqrfap;
  __le16 vqprt;
  __le16 vqfrsm;
  __le16 vqgran;
  __u8 rsvd48[16];
  __le32 vifrt;
  __le32 virfa;
  __le16 virfap;
  __le16 viprt;
  __le16 vifrsm;
  __le16 vigran;
  __u8 rsvd80[4016];
};

Members

cntlid: Controller Identifier
portid: Port Identifier
crt: Controller Resource Types
rsvd5: reserved
vqfrt: VQ Resources Flexible Total
vqrfa: VQ Resources Flexible Assigned
vqrfap: VQ Resources Flexible Allocated to Primary
vqprt: VQ Resources Private Total
vqfrsm: VQ Resources Flexible Secondary Maximum
vqgran: VQ Flexible Resource Preferred Granularity
rsvd48: reserved
vifrt: VI Resources Flexible Total
virfa: VI Resources Flexible Assigned
virfap: VI Resources Flexible Allocated to Primary
viprt: VI Resources Private Total
vifrsm: VI Resources Flexible Secondary Maximum
vigran: VI Flexible Resource Preferred Granularity
rsvd80: reserved

struct nvme_secondary_ctrl¶: Secondary Controller Entry

Definition

struct nvme_secondary_ctrl {
  __le16 scid;
  __le16 pcid;
  __u8 scs;
  __u8 rsvd5[3];
  __le16 vfn;
  __le16 nvq;
  __le16 nvi;
  __u8 rsvd14[18];
};

Members

scid: Secondary Controller Identifier
pcid: Primary Controller Identifier
scs: Secondary Controller State
rsvd5: Reserved
vfn: Virtual Function Number
nvq: Number of VQ Flexible Resources Assigned
nvi: Number of VI Flexible Resources Assigned
rsvd14: Reserved

struct nvme_secondary_ctrl_list¶: Secondary Controller List

Definition

struct nvme_secondary_ctrl_list {
  __u8 num;
  __u8 rsvd[31];
  struct nvme_secondary_ctrl sc_entry[NVME_ID_SECONDARY_CTRL_MAX];
};

Members

num: Number of Identifiers
rsvd: Reserved
sc_entry: Secondary Controller Entry

struct nvme_id_iocs¶: NVMe Identify IO Command Set data structure

Definition

struct nvme_id_iocs {
  __u64 iocsc[512];
};

Members

iocsc: List of supported IO Command Set Combination vectors

struct nvme_id_domain_attr¶: Domain Attributes Entry

Definition

struct nvme_id_domain_attr {
  __le16 dom_id;
  __u8 rsvd2[14];
  __u8 dom_cap[16];
  __u8 unalloc_dom_cap[16];
  __u8 max_egrp_dom_cap[16];
  __u8 rsvd64[64];
};

Members

dom_id: Domain Identifier
rsvd2: Reserved
dom_cap: Total Domain Capacity
unalloc_dom_cap: Unallocated Domain Capacity
max_egrp_dom_cap: Max Endurance Group Domain Capacity
rsvd64: Reserved

struct nvme_id_domain_list¶: Domain List

Definition

struct nvme_id_domain_list {
  __u8 num;
  __u8 rsvd[127];
  struct nvme_id_domain_attr domain_attr[NVME_ID_DOMAIN_LIST_MAX];
};

Members

num: Number of domain attributes
rsvd: Reserved
domain_attr: List of domain attributes

struct nvme_id_endurance_group_list¶: Endurance Group List

Definition

struct nvme_id_endurance_group_list {
  __le16 num;
  __le16 identifier[NVME_ID_ENDURANCE_GROUP_LIST_MAX];
};

Members

num: Number of Identifiers
identifier: Endurance Group Identifier

struct nvme_supported_log_pages¶: Supported Log Pages - Log

Definition

struct nvme_supported_log_pages {
  __le32 lid_support[NVME_LOG_SUPPORTED_LOG_PAGES_MAX];
};

Members

lid_support: Log Page Identifier Supported

Description

Supported Log Pages (Log Identifier 00h)

struct nvme_error_log_page¶: Error Information Log Entry (Log Identifier 01h)

Definition

struct nvme_error_log_page {
  __le64 error_count;
  __le16 sqid;
  __le16 cmdid;
  __le16 status_field;
  __le16 parm_error_location;
  __le64 lba;
  __le32 nsid;
  __u8 vs;
  __u8 trtype;
  __u8 rsvd[2];
  __le64 cs;
  __le16 trtype_spec_info;
  __u8 rsvd2[22];
};

Members

error_count: Error Count: a 64-bit incrementing error count, indicating a unique identifier for this error. The error count starts at 1h, is incremented for each unique error log entry, and is retained across power off conditions. A value of 0h indicates an invalid entry; this value is used when there are lost entries or when there are fewer errors than the maximum number of entries the controller supports. If the value of this field is FFFFFFFFh, then the field shall be set to 1h when incremented (i.e., rolls over to 1h). Prior to NVMe 1.4, processing of incrementing beyond FFFFFFFFh is unspecified.
sqid: Submission Queue ID: indicates the Submission Queue Identifier of the command that the error information is associated with. If the error is not specific to a particular command, then this field shall be set to FFFFh.
cmdid: Command ID: indicates the Command Identifier of the command that the error is associated with. If the error is not specific to a particular command, then this field shall be set to FFFFh.
status_field: Bits 15-1: Status Field: indicates the Status Field for the command that completed. If the error is not specific to a particular command, then this field reports the most applicable status value. Bit 0: Phase Tag: may indicate the Phase Tag posted for the command.
parm_error_location: Parameter Error Location: indicates the byte and bit of the command parameter that the error is associated with, if applicable. If the parameter spans multiple bytes or bits, then the location indicates the first byte and bit of the parameter. Bits 10-8: Bit in command that contained the error. Valid values are 0 to 7. Bits 7-0: Byte in command that contained the error. Valid values are 0 to 63.
lba: LBA: This field indicates the first LBA that experienced the error condition, if applicable.
nsid: Namespace: This field indicates the NSID of the namespace that the error is associated with, if applicable.
vs: Vendor Specific Information Available: If there is additional vendor specific error information available, this field provides the log page identifier associated with that page. A value of 0h indicates that no additional information is available. Valid values are in the range of 80h to FFh.
trtype: Transport Type (TRTYPE): indicates the Transport Type of the transport associated with the error. The values in this field are the same as the TRTYPE values in the Discovery Log Page Entry. If the error is not transport related, this field shall be cleared to 0h. If the error is transport related, this field shall be set to the type of the transport - see enum nvme_trtype.
rsvd: Reserved
cs: Command Specific Information: This field contains command specific information. If used, the command definition specifies the information returned.
trtype_spec_info: Transport Type Specific Information
rsvd2: Reserved

struct nvme_smart_log¶: SMART / Health Information Log (Log Identifier 02h)

Definition

struct nvme_smart_log {
  __u8 critical_warning;
  __u8 temperature[2];
  __u8 avail_spare;
  __u8 spare_thresh;
  __u8 percent_used;
  __u8 endu_grp_crit_warn_sumry;
  __u8 rsvd7[25];
  __u8 data_units_read[16];
  __u8 data_units_written[16];
  __u8 host_reads[16];
  __u8 host_writes[16];
  __u8 ctrl_busy_time[16];
  __u8 power_cycles[16];
  __u8 power_on_hours[16];
  __u8 unsafe_shutdowns[16];
  __u8 media_errors[16];
  __u8 num_err_log_entries[16];
  __le32 warning_temp_time;
  __le32 critical_comp_time;
  __le16 temp_sensor[8];
  __le32 thm_temp1_trans_count;
  __le32 thm_temp2_trans_count;
  __le32 thm_temp1_total_time;
  __le32 thm_temp2_total_time;
  __u8 rsvd232[280];
};

Members

critical_warning: This field indicates critical warnings for the state of the controller. Critical warnings may result in an asynchronous event notification to the host. Bits in this field represent the current associated state and are not persistent (see enum nvme_smart_crit).
temperature: Composite Temperature: Contains a value corresponding to a temperature in Kelvins that represents the current composite temperature of the controller and namespace(s) associated with that controller. The manner in which this value is computed is implementation specific and may not represent the actual temperature of any physical point in the NVM subsystem. Warning and critical overheating composite temperature threshold values are reported by the WCTEMP and CCTEMP fields in the Identify Controller data structure.
avail_spare: Available Spare: Contains a normalized percentage (0% to 100%) of the remaining spare capacity available.
spare_thresh: Available Spare Threshold: When the Available Spare falls below the threshold indicated in this field, an asynchronous event completion may occur. The value is indicated as a normalized percentage (0% to 100%). The values 101 to 255 are reserved.
percent_used: Percentage Used: Contains a vendor specific estimate of the percentage of NVM subsystem life used based on the actual usage and the manufacturer’s prediction of NVM life. A value of 100 indicates that the estimated endurance of the NVM in the NVM subsystem has been consumed, but may not indicate an NVM subsystem failure. The value is allowed to exceed 100. Percentages greater than 254 shall be represented as 255. This value shall be updated once per power-on hour (when the controller is not in a sleep state).
endu_grp_crit_warn_sumry: Endurance Group Critical Warning Summary: This field indicates critical warnings for the state of Endurance Groups. Bits in this field represent the current associated state and are not persistent (see enum nvme_smart_egcw).
rsvd7: Reserved
data_units_read: Data Units Read: Contains the number of 512 byte data units the host has read from the controller; this value does not include metadata. This value is reported in thousands (i.e., a value of 1 corresponds to 1000 units of 512 bytes read) and is rounded up (e.g., one indicates the that number of 512 byte data units read is from 1 to 1000, three indicates that the number of 512 byte data units read is from 2001 to 3000). When the LBA size is a value other than 512 bytes, the controller shall convert the amount of data read to 512 byte units. For the NVM command set, logical blocks read as part of Compare, Read, and Verify operations shall be included in this value. A value of 0h in this field indicates that the number of Data Units Read is not reported.
data_units_written: Data Units Written: Contains the number of 512 byte data units the host has written to the controller; this value does not include metadata. This value is reported in thousands (i.e., a value of 1 corresponds to 1000 units of 512 bytes written) and is rounded up (e.g., one indicates that the number of 512 byte data units written is from 1 to 1,000, three indicates that the number of 512 byte data units written is from 2001 to 3000). When the LBA size is a value other than 512 bytes, the controller shall convert the amount of data written to 512 byte units. For the NVM command set, logical blocks written as part of Write operations shall be included in this value. Write Uncorrectable commands and Write Zeroes commands shall not impact this value. A value of 0h in this field indicates that the number of Data Units Written is not reported.
host_reads: Host Read Commands: Contains the number of read commands completed by the controller. For the NVM command set, this value is the sum of the number of Compare commands and the number of Read commands.
host_writes: Host Write Commands: Contains the number of write commands completed by the controller. For the NVM command set, this is the number of Write commands.
ctrl_busy_time: Controller Busy Time: Contains the amount of time the controller is busy with I/O commands. The controller is busy when there is a command outstanding to an I/O Queue (specifically, a command was issued via an I/O Submission Queue Tail doorbell write and the corresponding completion queue entry has not been posted yet to the associated I/O Completion Queue). This value is reported in minutes.
power_cycles: Power Cycles: Contains the number of power cycles.
power_on_hours: Power On Hours: Contains the number of power-on hours. This may not include time that the controller was powered and in a non-operational power state.
unsafe_shutdowns: Unsafe Shutdowns: Contains the number of unsafe shutdowns. This count is incremented when a Shutdown Notification (CC.SHN) is not received prior to loss of power.
media_errors: Media and Data Integrity Errors: Contains the number of occurrences where the controller detected an unrecovered data integrity error. Errors such as uncorrectable ECC, CRC checksum failure, or LBA tag mismatch are included in this field. Errors introduced as a result of a Write Uncorrectable command may or may not be included in this field.
num_err_log_entries: Number of Error Information Log Entries: Contains the number of Error Information log entries over the life of the controller.
warning_temp_time: Warning Composite Temperature Time: Contains the amount of time in minutes that the controller is operational and the Composite Temperature is greater than or equal to the Warning Composite Temperature Threshold (WCTEMP) field and less than the Critical Composite Temperature Threshold (CCTEMP) field in the Identify Controller data structure. If the value of the WCTEMP or CCTEMP field is 0h, then this field is always cleared to 0h regardless of the Composite Temperature value.
critical_comp_time: Critical Composite Temperature Time: Contains the amount of time in minutes that the controller is operational and the Composite Temperature is greater than or equal to the Critical Composite Temperature Threshold (CCTEMP) field in the Identify Controller data structure. If the value of the CCTEMP field is 0h, then this field is always cleared to 0h regardless of the Composite Temperature value.
temp_sensor: Temperature Sensor 1-8: Contains the current temperature in degrees Kelvin reported by temperature sensors 1-8. The physical point in the NVM subsystem whose temperature is reported by the temperature sensor and the temperature accuracy is implementation specific. An implementation that does not implement the temperature sensor reports a value of 0h.
thm_temp1_trans_count: Thermal Management Temperature 1 Transition Count: Contains the number of times the controller transitioned to lower power active power states or performed vendor specific thermal management actions while minimizing the impact on performance in order to attempt to reduce the Composite Temperature because of the host controlled thermal management feature (i.e., the Composite Temperature rose above the Thermal Management Temperature 1). This counter shall not wrap once the value FFFFFFFFh is reached. A value of 0h, indicates that this transition has never occurred or this field is not implemented.
thm_temp2_trans_count: Thermal Management Temperature 2 Transition Count
thm_temp1_total_time: Total Time For Thermal Management Temperature 1: Contains the number of seconds that the controller had transitioned to lower power active power states or performed vendor specific thermal management actions while minimizing the impact on performance in order to attempt to reduce the Composite Temperature because of the host controlled thermal management feature. This counter shall not wrap once the value FFFFFFFFh is reached. A value of 0h, indicates that this transition has never occurred or this field is not implemented.
thm_temp2_total_time: Total Time For Thermal Management Temperature 2
rsvd232: Reserved

enum nvme_smart_crit¶: Critical Warning

Constants

NVME_SMART_CRIT_SPARE: If set, then the available spare capacity has fallen below the threshold.
NVME_SMART_CRIT_TEMPERATURE: If set, then a temperature is either greater than or equal to an over temperature threshold; or less than or equal to an under temperature threshold.
NVME_SMART_CRIT_DEGRADED: If set, then the NVM subsystem reliability has been degraded due to significant media related errors or any internal error that degrades NVM subsystem reliability.
NVME_SMART_CRIT_MEDIA: If set, then all of the media has been placed in read only mode. The controller shall not set this bit if the read-only condition on the media is a result of a change in the write protection state of a namespace.
NVME_SMART_CRIT_VOLATILE_MEMORY: If set, then the volatile memory backup device has failed. This field is only valid if the controller has a volatile memory backup solution.
NVME_SMART_CRIT_PMR_RO: If set, then the Persistent Memory Region has become read-only or unreliable.

enum nvme_smart_egcw¶: Endurance Group Critical Warning Summary

Constants

NVME_SMART_EGCW_SPARE: If set, then the available spare capacity of one or more Endurance Groups has fallen below the threshold.
NVME_SMART_EGCW_DEGRADED: If set, then the reliability of one or more Endurance Groups has been degraded due to significant media related errors or any internal error that degrades NVM subsystem reliability.
NVME_SMART_EGCW_RO: If set, then the namespaces in one or more Endurance Groups have been placed in read only mode not as a result of a change in the write protection state of a namespace.

struct nvme_firmware_slot¶: Firmware Slot Information Log

Definition

struct nvme_firmware_slot {
  __u8 afi;
  __u8 rsvd1[7];
  char frs[7][8];
  __u8 rsvd2[448];
};

Members

afi: Active Firmware Info
rsvd1: Reserved
frs: Firmware Revision for Slot
rsvd2: Reserved

struct nvme_cmd_effects_log¶: Commands Supported and Effects Log

Definition

struct nvme_cmd_effects_log {
  __le32 acs[256];
  __le32 iocs[256];
  __u8 rsvd[2048];
};

Members

acs: Admin Command Supported
iocs: I/O Command Supported
rsvd: Reserved

enum nvme_cmd_effects¶: Commands Supported and Effects

Constants

NVME_CMD_EFFECTS_CSUPP: Command Supported
NVME_CMD_EFFECTS_LBCC: Logical Block Content Change
NVME_CMD_EFFECTS_NCC: Namespace Capability Change
NVME_CMD_EFFECTS_NIC: Namespace Inventory Change
NVME_CMD_EFFECTS_CCC: Controller Capability Change
NVME_CMD_EFFECTS_CSE_MASK: Command Submission and Execution
NVME_CMD_EFFECTS_UUID_SEL: UUID Selection Supported

struct nvme_st_result¶: Self-test Result

Definition

struct nvme_st_result {
  __u8 dsts;
  __u8 seg;
  __u8 vdi;
  __u8 rsvd;
  __le64 poh;
  __le32 nsid;
  __le64 flba;
  __u8 sct;
  __u8 sc;
  __u8 vs[2];
};

Members

dsts: Device Self-test Status: Indicates the device self-test code and the status of the operation (see enum nvme_status_result and enum nvme_st_code).
seg: Segment Number: Iindicates the segment number where the first self-test failure occurred. If Device Self-test Status (dsts) is not set to #NVME_ST_RESULT_KNOWN_SEG_FAIL, then this field should be ignored.
vdi: Valid Diagnostic Information: Indicates the diagnostic failure information that is reported. See enum nvme_st_valid_diag_info.
rsvd: Reserved
poh: Power On Hours (POH): Indicates the number of power-on hours at the time the device self-test operation was completed or aborted. This does not include time that the controller was powered and in a low power state condition.
nsid: Namespace Identifier (NSID): Indicates the namespace that the Failing LBA occurred on. Valid only when the NSID Valid bit (#NVME_ST_VALID_DIAG_INFO_NSID) is set in the Valid Diagnostic Information (vdi) field.
flba: Failing LBA: indicates the LBA of the logical block that caused the test to fail. If the device encountered more than one failed logical block during the test, then this field only indicates one of those failed logical blocks. Valid only when the NSID Valid bit (#NVME_ST_VALID_DIAG_INFO_FLBA) is set in the Valid Diagnostic Information (vdi) field.
sct: Status Code Type: This field may contain additional information related to errors or conditions. Bits 2:0 may contain additional information relating to errors or conditions that occurred during the device self-test operation represented in the same format used in the Status Code Type field of the completion queue entry (refer to enum nvme_status_field). Valid only when the NSID Valid bit (#NVME_ST_VALID_DIAG_INFO_SCT) is set in the Valid Diagnostic Information (vdi) field.
sc: Status Code: This field may contain additional information relating to errors or conditions that occurred during the device self-test operation represented in the same format used in the Status Code field of the completion queue entry. Valid only when the SCT Valid bit (#NVME_ST_VALID_DIAG_INFO_SC) is set in the Valid Diagnostic Information (vdi) field.
vs: Vendor Specific.

enum nvme_status_result¶: Result of the device self-test operation

Constants

NVME_ST_RESULT_NO_ERR: Operation completed without error.
NVME_ST_RESULT_ABORTED: Operation was aborted by a Device Self-test command.
NVME_ST_RESULT_CLR: Operation was aborted by a Controller Level Reset.
NVME_ST_RESULT_NS_REMOVED: Operation was aborted due to a removal of a namespace from the namespace inventory.
NVME_ST_RESULT_ABORTED_FORMAT: Operation was aborted due to the processing of a Format NVM command.
NVME_ST_RESULT_FATAL_ERR: A fatal error or unknown test error occurred while the controller was executing the device self-test operation and the operation did not complete.
NVME_ST_RESULT_UNKNOWN_SEG_FAIL: Operation completed with a segment that failed and the segment that failed is not known.
NVME_ST_RESULT_KNOWN_SEG_FAIL: Operation completed with one or more failed segments and the first segment that failed is indicated in the Segment Number field.
NVME_ST_RESULT_ABORTED_UNKNOWN: Operation was aborted for unknown reason.
NVME_ST_RESULT_ABORTED_SANITIZE: Operation was aborted due to a sanitize operation.
NVME_ST_RESULT_NOT_USED: Entry not used (does not contain a test result).
NVME_ST_RESULT_MASK: Mask to get the status result value from the struct nvme_st_result.dsts field.

enum nvme_st_code¶: Self-test Code value

Constants

NVME_ST_CODE_RESERVED: Reserved.
NVME_ST_CODE_SHORT: Short device self-test operation.
NVME_ST_CODE_EXTENDED: Extended device self-test operation.
NVME_ST_CODE_VS: Vendor specific.
NVME_ST_CODE_SHIFT: Shift amount to get the code value from the struct nvme_st_result.dsts field.

enum nvme_st_curr_op¶: Current Device Self-Test Operation

Constants

NVME_ST_CURR_OP_NOT_RUNNING: No device self-test operation in progress.
NVME_ST_CURR_OP_SHORT: Short device self-test operation in progress.
NVME_ST_CURR_OP_EXTENDED: Extended device self-test operation in progress.
NVME_ST_CURR_OP_VS: Vendor specific.
NVME_ST_CURR_OP_RESERVED: Reserved.
NVME_ST_CURR_OP_MASK: Mask to get the current operation value from the struct nvme_self_test_log.current_operation field.
NVME_ST_CURR_OP_CMPL_MASK: Mask to get the current operation completion value from the struct nvme_self_test_log.completion field.

enum nvme_st_valid_diag_info¶: Valid Diagnostic Information

Constants

NVME_ST_VALID_DIAG_INFO_NSID: NSID Valid: if set, then the contents of the Namespace Identifier field are valid.
NVME_ST_VALID_DIAG_INFO_FLBA: FLBA Valid: if set, then the contents of the Failing LBA field are valid.
NVME_ST_VALID_DIAG_INFO_SCT: SCT Valid: if set, then the contents of the Status Code Type field are valid.
NVME_ST_VALID_DIAG_INFO_SC: SC Valid: if set, then the contents of the Status Code field are valid.

struct nvme_self_test_log¶: Device Self-test (Log Identifier 06h)

Definition

struct nvme_self_test_log {
  __u8 current_operation;
  __u8 completion;
  __u8 rsvd[2];
  struct nvme_st_result   result[NVME_LOG_ST_MAX_RESULTS];
};

Members

current_operation: Current Device Self-Test Operation: indicates the status of the current device self-test operation. If a device self-test operation is in process (i.e., this field is set to #NVME_ST_CURR_OP_SHORT or #NVME_ST_CURR_OP_EXTENDED), then the controller shall not set this field to #NVME_ST_CURR_OP_NOT_RUNNING until a new Self-test Result Data Structure is created (i.e., if a device self-test operation completes or is aborted, then the controller shall create a Self-test Result Data Structure prior to setting this field to #NVME_ST_CURR_OP_NOT_RUNNING). See enum nvme_st_curr_op.
completion: Current Device Self-Test Completion: indicates the percentage of the device self-test operation that is complete (e.g., a value of 25 indicates that 25% of the device self-test operation is complete and 75% remains to be tested). If the current_operation field is cleared to #NVME_ST_CURR_OP_NOT_RUNNING (indicating there is no device self-test operation in progress), then this field is ignored.
rsvd: Reserved
result: Self-test Result Data Structures, see struct nvme_st_result.

enum nvme_cmd_get_log_telemetry_host_lsp¶: Telemetry Host-Initiated log specific field

Constants

NVME_LOG_TELEM_HOST_LSP_RETAIN: Get Telemetry Data Blocks
NVME_LOG_TELEM_HOST_LSP_CREATE: Create Telemetry Data Blocks

struct nvme_telemetry_log¶: Retrieve internal data specific to the manufacturer.

Definition

struct nvme_telemetry_log {
  __u8 lpi;
  __u8 rsvd1[4];
  __u8 ieee[3];
  __le16 dalb1;
  __le16 dalb2;
  __le16 dalb3;
  __u8 rsvd14[2];
  __le32 dalb4;
  __u8 rsvd20[361];
  __u8 hostdgn;
  __u8 ctrlavail;
  __u8 ctrldgn;
  __u8 rsnident[128];
  __u8 data_area[];
};

Members

lpi: Log Identifier, either NVME_LOG_LID_TELEMETRY_HOST or NVME_LOG_LID_TELEMETRY_CTRL
rsvd1: Reserved
ieee: IEEE OUI Identifier is the Organization Unique Identifier (OUI) for the controller vendor that is able to interpret the data.
dalb1: Telemetry Controller-Initiated Data Area 1 Last Block is the value of the last block in this area.
dalb2: Telemetry Controller-Initiated Data Area 1 Last Block is the value of the last block in this area.
dalb3: Telemetry Controller-Initiated Data Area 1 Last Block is the value of the last block in this area.
rsvd14: Reserved
dalb4: Telemetry Controller-Initiated Data Area 4 Last Block is the value of the last block in this area.
rsvd20: Reserved
hostdgn: Telemetry Host-Initiated Data Generation Number is a value that is incremented each time the host initiates a capture of its internal controller state in the controller .
ctrlavail: Telemetry Controller-Initiated Data Available, if cleared, then the controller telemetry log does not contain saved internal controller state. If this field is set to 1h, the controller log contains saved internal controller state. If this field is set to 1h, the data will be latched until the host releases it by reading the log with RAE cleared.
ctrldgn: Telemetry Controller-Initiated Data Generation Number is a value that is incremented each time the controller initiates a capture of its internal controller state in the controller .
rsnident: Reason Identifiers a vendor specific identifier that describes the operating conditions of the controller at the time of capture.
data_area: Telemetry data blocks, vendor specific information data.

Description

This log consists of a header describing the log and zero or more Telemetry Data Blocks. All Telemetry Data Blocks are NVME_LOG_TELEM_BLOCK_SIZE, 512 bytes, in size. This log captures the controller’s internal state.

struct nvme_endurance_group_log¶: Endurance Group Information Log

Definition

struct nvme_endurance_group_log {
  __u8 critical_warning;
  __u8 rsvd1[2];
  __u8 avl_spare;
  __u8 avl_spare_threshold;
  __u8 percent_used;
  __u8 rsvd6[26];
  __u8 endurance_estimate[16];
  __u8 data_units_read[16];
  __u8 data_units_written[16];
  __u8 media_units_written[16];
  __u8 host_read_cmds[16];
  __u8 host_write_cmds[16];
  __u8 media_data_integrity_err[16];
  __u8 num_err_info_log_entries[16];
  __u8 rsvd160[352];
};

Members

critical_warning: Critical Warning
rsvd1: Reserved
avl_spare: Available Spare
avl_spare_threshold: Available Spare Threshold
percent_used: Percentage Used
rsvd6: Reserved
endurance_estimate: Endurance Estimate
data_units_read: Data Units Read
data_units_written: Data Units Written
media_units_written: Media Units Written
host_read_cmds: Host Read Commands
host_write_cmds: Host Write Commands
media_data_integrity_err: Media and Data Integrity Errors
num_err_info_log_entries: Number of Error Information Log Entries
rsvd160: Reserved

enum nvme_eg_critical_warning_flags¶: Endurance Group Information Log - Critical Warning

Constants

NVME_EG_CRITICAL_WARNING_SPARE: Available spare capacity of the Endurance Group has fallen below the threshold
NVME_EG_CRITICAL_WARNING_DEGRADED: Endurance Group reliability has been degraded
NVME_EG_CRITICAL_WARNING_READ_ONLY: Endurance Group have been placed in read only mode

struct nvme_aggregate_endurance_group_event¶: Endurance Group Event Aggregate

Definition

struct nvme_aggregate_endurance_group_event {
  __le64 num_entries;
  __le16 entries[];
};

Members

num_entries: Number or entries
entries: List of entries

struct nvme_nvmset_predictable_lat_log¶: Predictable Latency Mode - Deterministic Threshold Configuration Data

Definition

struct nvme_nvmset_predictable_lat_log {
  __u8 status;
  __u8 rsvd1;
  __le16 event_type;
  __u8 rsvd4[28];
  __le64 dtwin_rt;
  __le64 dtwin_wt;
  __le64 dtwin_tmax;
  __le64 ndwin_tmin_hi;
  __le64 ndwin_tmin_lo;
  __u8 rsvd72[56];
  __le64 dtwin_re;
  __le64 dtwin_we;
  __le64 dtwin_te;
  __u8 rsvd152[360];
};

Members

status: Status
rsvd1: Reserved
event_type: Event Type
rsvd4: Reserved
dtwin_rt: DTWIN Reads Typical
dtwin_wt: DTWIN Writes Typical
dtwin_tmax: DTWIN Time Maximum
ndwin_tmin_hi: NDWIN Time Minimum High
ndwin_tmin_lo: NDWIN Time Minimum Low
rsvd72: Reserved
dtwin_re: DTWIN Reads Estimate
dtwin_we: DTWIN Writes Estimate
dtwin_te: DTWIN Time Estimate
rsvd152: Reserved

enum nvme_nvmeset_pl_status¶: Predictable Latency Per NVM Set Log - Status

Constants

NVME_NVMSET_PL_STATUS_DISABLED: Not used (Predictable Latency Mode not enabled)
NVME_NVMSET_PL_STATUS_DTWIN: Deterministic Window (DTWIN)
NVME_NVMSET_PL_STATUS_NDWIN: Non-Deterministic Window (NDWIN)

enum nvme_nvmset_pl_events¶: Predictable Latency Per NVM Set Log - Event Type

Constants

NVME_NVMSET_PL_EVENT_DTWIN_READ_WARN: DTWIN Reads Warning
NVME_NVMSET_PL_EVENT_DTWIN_WRITE_WARN: DTWIN Writes Warning
NVME_NVMSET_PL_EVENT_DTWIN_TIME_WARN: DTWIN Time Warning
NVME_NVMSET_PL_EVENT_DTWIN_EXCEEDED: Autonomous transition from DTWIN to NDWIN due to typical or maximum value exceeded
NVME_NVMSET_PL_EVENT_DTWIN_EXCURSION: Autonomous transition from DTWIN to NDWIN due to Deterministic Excursion

struct nvme_aggregate_predictable_lat_event¶: Predictable Latency Event Aggregate Log Page

Definition

struct nvme_aggregate_predictable_lat_event {
  __le64 num_entries;
  __le16 entries[];
};

Members

num_entries: Number of entries
entries: Entry list

struct nvme_ana_group_desc¶: ANA Group Descriptor

Definition

struct nvme_ana_group_desc {
  __le32 grpid;
  __le32 nnsids;
  __le64 chgcnt;
  __u8 state;
  __u8 rsvd17[15];
  __le32 nsids[];
};

Members

grpid: ANA group id
nnsids: Number of namespaces in nsids
chgcnt: Change counter
state: ANA state
rsvd17: Reserved
nsids: List of namespaces

enum nvme_ana_state¶: ANA Group Descriptor - Asymmetric Namespace Access State

Constants

NVME_ANA_STATE_OPTIMIZED: ANA Optimized state
NVME_ANA_STATE_NONOPTIMIZED: ANA Non-Optimized state
NVME_ANA_STATE_INACCESSIBLE: ANA Inaccessible state
NVME_ANA_STATE_PERSISTENT_LOSS: ANA Persistent Loss state
NVME_ANA_STATE_CHANGE: ANA Change state

struct nvme_ana_log¶: Asymmetric Namespace Access Log

Definition

struct nvme_ana_log {
  __le64 chgcnt;
  __le16 ngrps;
  __u8 rsvd10[6];
  struct nvme_ana_group_desc descs[];
};

Members

chgcnt: Change Count
ngrps: Number of ANA Group Descriptors
rsvd10: Reserved
descs: ANA Group Descriptor

struct nvme_persistent_event_log¶: Persistent Event Log

Definition

struct nvme_persistent_event_log {
  __u8 lid;
  __u8 rsvd1[3];
  __le32 tnev;
  __le64 tll;
  __u8 rv;
  __u8 rsvd17;
  __le16 lhl;
  __le64 ts;
  __u8 poh[16];
  __le64 pcc;
  __le16 vid;
  __le16 ssvid;
  char sn[20];
  char mn[40];
  char subnqn[NVME_NQN_LENGTH];
  __le16 gen_number;
  __le32 rci;
  __u8 rsvd378[102];
  __u8 seb[32];
};

Members

lid: Log Identifier
rsvd1: Reserved
tnev: Total Number of Events
tll: Total Log Length
rv: Log Revision
rsvd17: Reserved
lhl: Log Header Length
ts: Timestamp
poh: Power on Hours
pcc: Power Cycle Count
vid: PCI Vendor ID
ssvid: PCI Subsystem Vendor ID
sn: Serial Number
mn: Model Number
subnqn: NVM Subsystem NVMe Qualified Name
gen_number: Generation Number
rci: Reporting Context Information
rsvd378: Reserved
seb: Supported Events Bitmap

struct nvme_persistent_event_entry¶: Persistent Event

Definition

struct nvme_persistent_event_entry {
  __u8 etype;
  __u8 etype_rev;
  __u8 ehl;
  __u8 ehai;
  __le16 cntlid;
  __le64 ets;
  __le16 pelpid;
  __u8 rsvd16[4];
  __le16 vsil;
  __le16 el;
};

Members

etype: Event Type
etype_rev: Event Type Revision
ehl: Event Header Length
ehai: Event Header Additional Info
cntlid: Controller Identifier
ets: Event Timestamp
pelpid: Port Identifier
rsvd16: Reserved
vsil: Vendor Specific Information Length
el: Event Length

enum nvme_persistent_event_types¶: Persistent event log events

Constants

NVME_PEL_SMART_HEALTH_EVENT: SMART / Health Log Snapshot Event
NVME_PEL_FW_COMMIT_EVENT: Firmware Commit Event
NVME_PEL_TIMESTAMP_EVENT: Timestamp Change Event
NVME_PEL_POWER_ON_RESET_EVENT: Power-on or Reset Event
NVME_PEL_NSS_HW_ERROR_EVENT: NVM Subsystem Hardware Error Event
NVME_PEL_CHANGE_NS_EVENT: Change Namespace Event
NVME_PEL_FORMAT_START_EVENT: Format NVM Start Event
NVME_PEL_FORMAT_COMPLETION_EVENT: Format NVM Completion Event
NVME_PEL_SANITIZE_START_EVENT: Sanitize Start Event
NVME_PEL_SANITIZE_COMPLETION_EVENT: Sanitize Completion Event
NVME_PEL_SET_FEATURE_EVENT: Set Feature Event
NVME_PEL_TELEMETRY_CRT: Telemetry Log Create Event
NVME_PEL_THERMAL_EXCURSION_EVENT: Thermal Excursion Event

struct nvme_fw_commit_event¶: Firmware Commit Event Data

Definition

struct nvme_fw_commit_event {
  __le64 old_fw_rev;
  __le64 new_fw_rev;
  __u8 fw_commit_action;
  __u8 fw_slot;
  __u8 sct_fw;
  __u8 sc_fw;
  __le16 vndr_assign_fw_commit_rc;
};

Members

old_fw_rev: Old Firmware Revision
new_fw_rev: New Firmware Revision
fw_commit_action: Firmware Commit Action
fw_slot: Firmware Slot
sct_fw: Status Code Type for Firmware Commit Command
sc_fw: Status Returned for Firmware Commit Command
vndr_assign_fw_commit_rc: Vendor Assigned Firmware Commit Result Code

struct nvme_time_stamp_change_event¶: Timestamp Change Event

Definition

struct nvme_time_stamp_change_event {
  __le64 previous_timestamp;
  __le64 ml_secs_since_reset;
};

Members

previous_timestamp: Previous Timestamp
ml_secs_since_reset: Milliseconds Since Reset

struct nvme_power_on_reset_info_list¶: Controller Reset Information

Definition

struct nvme_power_on_reset_info_list {
  __le16 cid;
  __u8 fw_act;
  __u8 op_in_prog;
  __u8 rsvd4[12];
  __le32 ctrl_power_cycle;
  __le64 power_on_ml_seconds;
  __le64 ctrl_time_stamp;
};

Members

cid: Controller ID
fw_act: Firmware Activation
op_in_prog: Operation in Progress
rsvd4: Reserved
ctrl_power_cycle: Controller Power Cycle
power_on_ml_seconds: Power on milliseconds
ctrl_time_stamp: Controller Timestamp

struct nvme_nss_hw_err_event¶: NVM Subsystem Hardware Error Event

Definition

struct nvme_nss_hw_err_event {
  __le16 nss_hw_err_event_code;
  __u8 rsvd2[2];
  __u8 *add_hw_err_info;
};

Members

nss_hw_err_event_code: NVM Subsystem Hardware Error Event Code
rsvd2: Reserved
add_hw_err_info: Additional Hardware Error Information

struct nvme_change_ns_event¶: Change Namespace Event Data

Definition

struct nvme_change_ns_event {
  __le32 nsmgt_cdw10;
  __u8 rsvd4[4];
  __le64 nsze;
  __u8 rsvd16[8];
  __le64 nscap;
  __u8 flbas;
  __u8 dps;
  __u8 nmic;
  __u8 rsvd35;
  __le32 ana_grp_id;
  __le16 nvmset_id;
  __le16 rsvd42;
  __le32 nsid;
};

Members

nsmgt_cdw10: Namespace Management CDW10
rsvd4: Reserved
nsze: Namespace Size
rsvd16: Reserved
nscap: Namespace Capacity
flbas: Formatted LBA Size
dps: End-to-end Data Protection Type Settings
nmic: Namespace Multi-path I/O and Namespace Sharing Capabilities
rsvd35: Reserved
ana_grp_id: ANA Group Identifier
nvmset_id: NVM Set Identifier
rsvd42: Reserved
nsid: Namespace ID

struct nvme_format_nvm_start_event¶: Format NVM Start Event Data

Definition

struct nvme_format_nvm_start_event {
  __le32 nsid;
  __u8 fna;
  __u8 rsvd5[3];
  __le32 format_nvm_cdw10;
};

Members

nsid: Namespace Identifier
fna: Format NVM Attributes
rsvd5: Reserved
format_nvm_cdw10: Format NVM CDW10

struct nvme_format_nvm_compln_event¶: Format NVM Completion Event Data

Definition

struct nvme_format_nvm_compln_event {
  __le32 nsid;
  __u8 smallest_fpi;
  __u8 format_nvm_status;
  __le16 compln_info;
  __le32 status_field;
};

Members

nsid: Namespace Identifier
smallest_fpi: Smallest Format Progress Indicator
format_nvm_status: Format NVM Status
compln_info: Completion Information
status_field: Status Field

struct nvme_sanitize_start_event¶: Sanitize Start Event Data

Definition

struct nvme_sanitize_start_event {
  __le32 sani_cap;
  __le32 sani_cdw10;
  __le32 sani_cdw11;
};

Members

sani_cap: SANICAP
sani_cdw10: Sanitize CDW10
sani_cdw11: Sanitize CDW11

struct nvme_sanitize_compln_event¶: Sanitize Completion Event Data

Definition

struct nvme_sanitize_compln_event {
  __le16 sani_prog;
  __le16 sani_status;
  __le16 cmpln_info;
  __u8 rsvd6[2];
};

Members

sani_prog: Sanitize Progress
sani_status: Sanitize Status
cmpln_info: Completion Information
rsvd6: Reserved

struct nvme_set_feature_event¶: Set Feature Event Data

Definition

struct nvme_set_feature_event {
  __le32 layout;
  __le32 cdw_mem[0];
};

Members

layout: Set Feature Event Layout
cdw_mem: Command Dwords Memory buffer

struct nvme_thermal_exc_event¶: Thermal Excursion Event Data

Definition

struct nvme_thermal_exc_event {
  __u8 over_temp;
  __u8 threshold;
};

Members

over_temp: Over Temperature
threshold: temperature threshold

struct nvme_lba_rd¶: LBA Range Descriptor

Definition

struct nvme_lba_rd {
  __le64 rslba;
  __le32 rnlb;
  __u8 rsvd12[4];
};

Members

rslba: Range Starting LBA
rnlb: Range Number of Logical Blocks
rsvd12: Reserved

struct nvme_lbas_ns_element¶: LBA Status Log Namespace Element

Definition

struct nvme_lbas_ns_element {
  __le32 neid;
  __le32 nlrd;
  __u8 ratype;
  __u8 rsvd8[7];
  struct nvme_lba_rd lba_rd[];
};

Members

neid: Namespace Element Identifier
nlrd: Number of LBA Range Descriptors
ratype: Recommended Action Type. see enum nvme_lba_status_atype
rsvd8: Reserved
lba_rd: LBA Range Descriptor

enum nvme_lba_status_atype¶: Potentially Unrecoverable LBAs

Constants

NVME_LBA_STATUS_ATYPE_SCAN_UNTRACKED: Potentially Unrecoverable LBAs
NVME_LBA_STATUS_ATYPE_SCAN_TRACKED: Potentially Unrecoverable LBAs associated with physical storage

struct nvme_lba_status_log¶: LBA Status Information Log

Definition

struct nvme_lba_status_log {
  __le32 lslplen;
  __le32 nlslne;
  __le32 estulb;
  __u8 rsvd12[2];
  __le16 lsgc;
  struct nvme_lbas_ns_element elements[];
};

Members

lslplen: LBA Status Log Page Length
nlslne: Number of LBA Status Log Namespace Elements
estulb: Estimate of Unrecoverable Logical Blocks
rsvd12: Reserved
lsgc: LBA Status Generation Counter
elements: LBA Status Log Namespace Element List

struct nvme_eg_event_aggregate_log¶: Endurance Group Event Aggregate

Definition

struct nvme_eg_event_aggregate_log {
  __le64 nr_entries;
  __le16 egids[];
};

Members

nr_entries: Number of Entries
egids: Endurance Group Identifier

enum nvme_fid_supported_effects¶: FID Supported and Effects Data Structure definitions

Constants

NVME_FID_SUPPORTED_EFFECTS_FSUPP: FID Supported
NVME_FID_SUPPORTED_EFFECTS_UDCC: User Data Content Change
NVME_FID_SUPPORTED_EFFECTS_NCC: Namespace Capability Change
NVME_FID_SUPPORTED_EFFECTS_NIC: Namespace Inventory Change
NVME_FID_SUPPORTED_EFFECTS_CCC: Controller Capability Change
NVME_FID_SUPPORTED_EFFECTS_UUID_SEL: UUID Selection Supported
NVME_FID_SUPPORTED_EFFECTS_SCOPE_SHIFT: FID Scope Shift
NVME_FID_SUPPORTED_EFFECTS_SCOPE_MASK: FID Scope Mask
NVME_FID_SUPPORTED_EFFECTS_SCOPE_NS: Namespace Scope
NVME_FID_SUPPORTED_EFFECTS_SCOPE_CTRL: Controller Scope
NVME_FID_SUPPORTED_EFFECTS_SCOPE_NVM_SET: NVM Set Scope
NVME_FID_SUPPORTED_EFFECTS_SCOPE_ENDGRP: Endurance Group Scope
NVME_FID_SUPPORTED_EFFECTS_SCOPE_DOMAIN: Domain Scope
NVME_FID_SUPPORTED_EFFECTS_SCOPE_NSS: NVM Subsystem Scope

struct nvme_fid_supported_effects_log¶: Feature Identifiers Supported and Effects

Definition

struct nvme_fid_supported_effects_log {
  __le32 fid_support[NVME_LOG_FID_SUPPORTED_EFFECTS_MAX];
};

Members

fid_support: Feature Identifier Supported

enum nvme_mi_cmd_supported_effects¶: MI Command Supported and Effects Data Structure

Constants

NVME_MI_CMD_SUPPORTED_EFFECTS_CSUPP: Command Supported
NVME_MI_CMD_SUPPORTED_EFFECTS_UDCC: User Data Content Change
NVME_MI_CMD_SUPPORTED_EFFECTS_NCC: Namespace Capability Change
NVME_MI_CMD_SUPPORTED_EFFECTS_NIC: Namespace Inventory Change
NVME_MI_CMD_SUPPORTED_EFFECTS_CCC: Controller Capability Change
NVME_MI_CMD_SUPPORTED_EFFECTS_SCOPE_SHIFT: 20 bit shift
NVME_MI_CMD_SUPPORTED_EFFECTS_SCOPE_MASK: 12 bit mask - 0xfff
NVME_MI_CMD_SUPPORTED_EFFECTS_SCOPE_NS: Namespace Scope
NVME_MI_CMD_SUPPORTED_EFFECTS_SCOPE_CTRL: Controller Scope
NVME_MI_CMD_SUPPORTED_EFFECTS_SCOPE_NVM_SET: NVM Set Scope
NVME_MI_CMD_SUPPORTED_EFFECTS_SCOPE_ENDGRP: Endurance Group Scope
NVME_MI_CMD_SUPPORTED_EFFECTS_SCOPE_DOMAIN: Domain Scope
NVME_MI_CMD_SUPPORTED_EFFECTS_SCOPE_NSS: NVM Subsystem Scope

struct nvme_mi_cmd_supported_effects_log¶: NVMe-MI Commands Supported and Effects Log

Definition

struct nvme_mi_cmd_supported_effects_log {
  __le32 mi_cmd_support[NVME_LOG_MI_CMD_SUPPORTED_EFFECTS_MAX];
  __le32 reserved1[NVME_LOG_MI_CMD_SUPPORTED_EFFECTS_RESERVED];
};

Members

mi_cmd_support: NVMe-MI Commands Supported
reserved1: Reserved

struct nvme_boot_partition¶: Boot Partition Log

Definition

struct nvme_boot_partition {
  __u8 lid;
  __u8 rsvd1[3];
  __le32 bpinfo;
  __u8 rsvd8[8];
  __u8 boot_partition_data[];
};

Members

lid: Boot Partition Identifier
rsvd1: Reserved
bpinfo: Boot Partition Information
rsvd8: Reserved
boot_partition_data: Contains the contents of the specified Boot Partition

struct nvme_media_unit_stat_desc¶: Media Unit Status Descriptor

Definition

struct nvme_media_unit_stat_desc {
  __le16 muid;
  __le16 domainid;
  __le16 endgid;
  __le16 nvmsetid;
  __le16 cap_adj_fctr;
  __u8 avl_spare;
  __u8 percent_used;
  __u8 mucs;
  __u8 cio;
};

Members

muid: Media Unit Identifier
domainid: Domain Identifier
endgid: Endurance Group Identifier
nvmsetid: NVM Set Identifier
cap_adj_fctr: Capacity Adjustment Factor
avl_spare: Available Spare
percent_used: Percentage Used
mucs: Number of Channels attached to media units
cio: Channel Identifiers Offset

struct nvme_media_unit_stat_log¶: Media Unit Status

Definition

struct nvme_media_unit_stat_log {
  __le16 nmu;
  __le16 cchans;
  __le16 sel_config;
  __u8 rsvd6[10];
  struct nvme_media_unit_stat_desc mus_desc[];
};

Members

nmu: Number unit status descriptor
cchans: Number of Channels
sel_config: Selected Configuration
rsvd6: Reserved
mus_desc: Media unit statistic descriptors

struct nvme_media_unit_config_desc¶: Media Unit Configuration Descriptor

Definition

struct nvme_media_unit_config_desc {
  __le16 muid;
  __u8 rsvd2[4];
  __le16 mudl;
};

Members

muid: Media Unit Identifier
rsvd2: Reserved
mudl: Media Unit Descriptor Length

struct nvme_channel_config_desc¶: Channel Configuration Descriptor

Definition

struct nvme_channel_config_desc {
  __le16 chanid;
  __le16 chmus;
  struct nvme_media_unit_config_desc mu_config_desc[];
};

Members

chanid: Channel Identifier
chmus: Number Channel Media Units
mu_config_desc: Channel Unit config descriptors. See struct nvme_media_unit_config_desc

struct nvme_end_grp_chan_desc¶: Endurance Group Channel Configuration Descriptor

Definition

struct nvme_end_grp_chan_desc {
  __le16 egchans;
  struct nvme_channel_config_desc chan_config_desc[];
};

Members

egchans: Number of Channels
chan_config_desc: Channel config descriptors. See struct nvme_channel_config_desc

struct nvme_end_grp_config_desc¶: Endurance Group Configuration Descriptor

Definition

struct nvme_end_grp_config_desc {
  __le16 endgid;
  __le16 cap_adj_factor;
  __u8 rsvd4[12];
  __u8 tegcap[16];
  __u8 segcap[16];
  __u8 end_est[16];
  __u8 rsvd64[16];
  __le16 egsets;
  __le16 nvmsetid[];
};

Members

endgid: Endurance Group Identifier
cap_adj_factor: Capacity Adjustment Factor
rsvd4: Reserved
tegcap: Total Endurance Group Capacity
segcap: Spare Endurance Group Capacity
end_est: Endurance Estimate
rsvd64: Reserved
egsets: Number of NVM Sets
nvmsetid: NVM Set Identifier

struct nvme_capacity_config_desc¶: Capacity Configuration structure definitions

Definition

struct nvme_capacity_config_desc {
  __le16 cap_config_id;
  __le16 domainid;
  __le16 egcn;
  __u8 rsvd6[26];
  struct nvme_end_grp_config_desc egcd[];
};

Members

cap_config_id: Capacity Configuration Identifier
domainid: Domain Identifier
egcn: Number Endurance Group Configuration Descriptors
rsvd6: Reserved
egcd: Endurance Group Config descriptors. See struct nvme_end_grp_config_desc

struct nvme_supported_cap_config_list_log¶: Supported Capacity Configuration list log page

Definition

struct nvme_supported_cap_config_list_log {
  __u8 sccn;
  __u8 rsvd1[15];
  struct nvme_capacity_config_desc cap_config_desc[];
};

Members

sccn: Number of capacity configuration
rsvd1: Reserved
cap_config_desc: Capacity configuration descriptor. See struct nvme_capacity_config_desc

struct nvme_resv_notification_log¶: Reservation Notification Log

Definition

struct nvme_resv_notification_log {
  __le64 lpc;
  __u8 rnlpt;
  __u8 nalp;
  __u8 rsvd9[2];
  __le32 nsid;
  __u8 rsvd16[48];
};

Members

lpc: Log Page Count
rnlpt: See enum nvme_resv_notify_rnlpt.
nalp: Number of Available Log Pages
rsvd9: Reserved
nsid: Namespace ID
rsvd16: Reserved

enum nvme_resv_notify_rnlpt¶: Reservation Notification Log - Reservation Notification Log Page Type

Constants

NVME_RESV_NOTIFY_RNLPT_EMPTY: Empty Log Page
NVME_RESV_NOTIFY_RNLPT_REGISTRATION_PREEMPTED: Registration Preempted
NVME_RESV_NOTIFY_RNLPT_RESERVATION_RELEASED: Reservation Released
NVME_RESV_NOTIFY_RNLPT_RESERVATION_PREEMPTED: Reservation Preempted

struct nvme_sanitize_log_page¶: Sanitize Status (Log Identifier 81h)

Definition

struct nvme_sanitize_log_page {
  __le16 sprog;
  __le16 sstat;
  __le32 scdw10;
  __le32 eto;
  __le32 etbe;
  __le32 etce;
  __le32 etond;
  __le32 etbend;
  __le32 etcend;
  __u8 rsvd32[480];
};

Members

sprog: Sanitize Progress (SPROG): indicates the fraction complete of the sanitize operation. The value is a numerator of the fraction complete that has 65,536 (10000h) as its denominator. This value shall be set to FFFFh if the sstat field is not set to NVME_SANITIZE_SSTAT_STATUS_IN_PROGESS.
sstat: Sanitize Status (SSTAT): indicates the status associated with the most recent sanitize operation. See enum nvme_sanitize_sstat.
scdw10: Sanitize Command Dword 10 Information (SCDW10): contains the value of the Command Dword 10 field of the Sanitize command that started the sanitize operation.
eto: Estimated Time For Overwrite: indicates the number of seconds required to complete an Overwrite sanitize operation with 16 passes in the background when the No-Deallocate Modifies Media After Sanitize field is not set to 10b. A value of 0h indicates that the sanitize operation is expected to be completed in the background when the Sanitize command that started that operation is completed. A value of FFFFFFFFh indicates that no time period is reported.
etbe: Estimated Time For Block Erase: indicates the number of seconds required to complete a Block Erase sanitize operation in the background when the No-Deallocate Modifies Media After Sanitize field is not set to 10b. A value of 0h indicates that the sanitize operation is expected to be completed in the background when the Sanitize command that started that operation is completed. A value of FFFFFFFFh indicates that no time period is reported.
etce: Estimated Time For Crypto Erase: indicates the number of seconds required to complete a Crypto Erase sanitize operation in the background when the No-Deallocate Modifies Media After Sanitize field is not set to 10b. A value of 0h indicates that the sanitize operation is expected to be completed in the background when the Sanitize command that started that operation is completed. A value of FFFFFFFFh indicates that no time period is reported.
etond: Estimated Time For Overwrite With No-Deallocate Media Modification: indicates the number of seconds required to complete an Overwrite sanitize operation and the associated additional media modification after the Overwrite sanitize operation in the background when the No-Deallocate After Sanitize bit was set to 1 in the Sanitize command that requested the Overwrite sanitize operation; and the No-Deallocate Modifies Media After Sanitize field is set to 10b. A value of 0h indicates that the sanitize operation is expected to be completed in the background when the Sanitize command that started that operation is completed. A value of FFFFFFFFh indicates that no time period is reported.
etbend: Estimated Time For Block Erase With No-Deallocate Media Modification: indicates the number of seconds required to complete a Block Erase sanitize operation and the associated additional media modification after the Block Erase sanitize operation in the background when the No-Deallocate After Sanitize bit was set to 1 in the Sanitize command that requested the Overwrite sanitize operation; and the No-Deallocate Modifies Media After Sanitize field is set to 10b. A value of 0h indicates that the sanitize operation is expected to be completed in the background when the Sanitize command that started that operation is completed. A value of FFFFFFFFh indicates that no time period is reported.
etcend: Estimated Time For Crypto Erase With No-Deallocate Media Modification: indicates the number of seconds required to complete a Crypto Erase sanitize operation and the associated additional media modification after the Crypto Erase sanitize operation in the background when the No-Deallocate After Sanitize bit was set to 1 in the Sanitize command that requested the Overwrite sanitize operation; and the No-Deallocate Modifies Media After Sanitize field is set to 10b. A value of 0h indicates that the sanitize operation is expected to be completed in the background when the Sanitize command that started that operation is completed. A value of FFFFFFFFh indicates that no time period is reported.
rsvd32: Reserved

enum nvme_sanitize_sstat¶: Sanitize Status (SSTAT)

Constants

NVME_SANITIZE_SSTAT_STATUS_SHIFT: Shift amount to get the status value of the most recent sanitize operation from the struct nvme_sanitize_log_page.sstat field.
NVME_SANITIZE_SSTAT_STATUS_MASK: Mask to get the status value of the most recent sanitize operation.
NVME_SANITIZE_SSTAT_STATUS_NEVER_SANITIZED: The NVM subsystem has never been sanitized.
NVME_SANITIZE_SSTAT_STATUS_COMPLETE_SUCCESS: The most recent sanitize operation completed successfully including any additional media modification.
NVME_SANITIZE_SSTAT_STATUS_IN_PROGESS: A sanitize operation is currently in progress.
NVME_SANITIZE_SSTAT_STATUS_COMPLETED_FAILED: The most recent sanitize operation failed.
NVME_SANITIZE_SSTAT_STATUS_ND_COMPLETE_SUCCESS: The most recent sanitize operation for which No-Deallocate After Sanitize was requested has completed successfully with deallocation of all user data.
NVME_SANITIZE_SSTAT_COMPLETED_PASSES_SHIFT: Shift amount to get the number of completed passes if the most recent sanitize operation was an Overwrite. This value shall be cleared to 0h if the most recent sanitize operation was not an Overwrite.
NVME_SANITIZE_SSTAT_COMPLETED_PASSES_MASK: Mask to get the number of completed passes.
NVME_SANITIZE_SSTAT_GLOBAL_DATA_ERASED_SHIFT: Shift amount to get the Global Data Erased value from the struct nvme_sanitize_log_page.sstat field.
NVME_SANITIZE_SSTAT_GLOBAL_DATA_ERASED_MASK: Mask to get the Global Data Erased value.
NVME_SANITIZE_SSTAT_GLOBAL_DATA_ERASED: Global Data Erased: if set, then no namespace user data in the NVM subsystem has been written to and no Persistent Memory Region in the NVM subsystem has been enabled since being manufactured and the NVM subsystem has never been sanitized; or since the most recent successful sanitize operation.

struct nvme_zns_changed_zone_log¶: ZNS Changed Zone List log

Definition

struct nvme_zns_changed_zone_log {
  __le16 nrzid;
  __u8 rsvd2[6];
  __le64 zid[NVME_ZNS_CHANGED_ZONES_MAX];
};

Members

nrzid: Number of Zone Identifiers
rsvd2: Reserved
zid: Zone Identifier

enum nvme_zns_zt¶: Zone Descriptor Data Structure - Zone Type

Constants

NVME_ZONE_TYPE_SEQWRITE_REQ: Sequential Write Required

enum nvme_zns_za¶: Zone Descriptor Data Structure

Constants

NVME_ZNS_ZA_ZFC: Zone Finished by Controller
NVME_ZNS_ZA_FZR: Finish Zone Recommended
NVME_ZNS_ZA_RZR: Reset Zone Recommended

NVME_ZNS_ZA_ZRWAV

NVME_ZNS_ZA_ZDEV: Zone Descriptor Extension Valid

enum nvme_zns_zs¶: Zone Descriptor Data Structure - Zone State

Constants

NVME_ZNS_ZS_EMPTY: Empty state
NVME_ZNS_ZS_IMPL_OPEN: Implicitly open state
NVME_ZNS_ZS_EXPL_OPEN: Explicitly open state
NVME_ZNS_ZS_CLOSED: Closed state
NVME_ZNS_ZS_READ_ONLY: Read only state
NVME_ZNS_ZS_FULL: Full state
NVME_ZNS_ZS_OFFLINE: Offline state

struct nvme_zns_desc¶: Zone Descriptor Data Structure

Definition

struct nvme_zns_desc {
  __u8 zt;
  __u8 zs;
  __u8 za;
  __u8 zai;
  __u8 rsvd4[4];
  __le64 zcap;
  __le64 zslba;
  __le64 wp;
  __u8 rsvd32[32];
};

Members

zt: Zone Type
zs: Zone State
za: Zone Attributes
zai: Zone Attributes Information
rsvd4: Reserved
zcap: Zone Capacity
zslba: Zone Start Logical Block Address
wp: Write Pointer
rsvd32: Reserved

struct nvme_zone_report¶: Report Zones Data Structure

Definition

struct nvme_zone_report {
  __le64 nr_zones;
  __u8 rsvd8[56];
  struct nvme_zns_desc    entries[];
};

Members

nr_zones: Number of descriptors in entries
rsvd8: Reserved
entries: Zoned namespace descriptors

struct nvme_lba_status_desc¶: LBA Status Descriptor Entry

Definition

struct nvme_lba_status_desc {
  __le64 dslba;
  __le32 nlb;
  __u8 rsvd12;
  __u8 status;
  __u8 rsvd14[2];
};

Members

dslba: Descriptor Starting LBA
nlb: Number of Logical Blocks
rsvd12: Reserved
status: Additional status about this LBA range
rsvd14: Reserved

struct nvme_lba_status¶: LBA Status Descriptor List

Definition

struct nvme_lba_status {
  __le32 nlsd;
  __u8 cmpc;
  __u8 rsvd5[3];
  struct nvme_lba_status_desc descs[];
};

Members

nlsd: Number of LBA Status Descriptors
cmpc: Completion Condition
rsvd5: Reserved
descs: LBA status descriptor Entry

struct nvme_feat_auto_pst¶: Autonomous Power State Transition

Definition

struct nvme_feat_auto_pst {
  __le64 apst_entry[32];
};

Members

apst_entry: See enum nvme_apst_entry

enum nvme_apst_entry¶: Autonomous Power State Transition

Constants

NVME_APST_ENTRY_ITPS_SHIFT: Idle Transition Power State Shift
NVME_APST_ENTRY_ITPT_SHIFT: Idle Time Prior to Transition Shift
NVME_APST_ENTRY_ITPS_MASK: Idle Transition Power State Mask
NVME_APST_ENTRY_ITPT_MASK: Idle Time Prior to Transition Mask

struct nvme_metadata_element_desc¶: Metadata Element Descriptor

Definition

struct nvme_metadata_element_desc {
  __u8 type;
  __u8 rev;
  __u16 len;
  __u8 val[0];
};

Members

type: Element Type (ET)
rev: Element Revision (ER)
len: Element Length (ELEN)
val: Element Value (EVAL), UTF-8 string

struct nvme_host_metadata¶: Host Metadata Data Structure

Definition

struct nvme_host_metadata {
  __u8 ndesc;
  __u8 rsvd1;
  union {
    struct nvme_metadata_element_desc descs[0];
    __u8 descs_buf[4094];
  };
};

Members

ndesc: Number of metadata element descriptors
rsvd1: Reserved
{unnamed_union}: anonymous
descs: Metadata element descriptors
descs_buf: Metadata element descriptor buffer

enum nvme_ctrl_metadata_type¶: Controller Metadata Element Types

Constants

NVME_CTRL_METADATA_OS_CTRL_NAME: Name of the controller in the operating system.
NVME_CTRL_METADATA_OS_DRIVER_NAME: Name of the driver in the operating system.
NVME_CTRL_METADATA_OS_DRIVER_VER: Version of the driver in the operating system.
NVME_CTRL_METADATA_PRE_BOOT_CTRL_NAME: Name of the controller in the pre-boot environment.
NVME_CTRL_METADATA_PRE_BOOT_DRIVER_NAME: Name of the driver in the pre-boot environment.
NVME_CTRL_METADATA_PRE_BOOT_DRIVER_VER: Version of the driver in the pre-boot environment.
NVME_CTRL_METADATA_SYS_PROC_MODEL: Model of the processor.
NVME_CTRL_METADATA_CHIPSET_DRV_NAME: Chipset driver name.
NVME_CTRL_METADATA_CHIPSET_DRV_VERSION: Chipset driver version.
NVME_CTRL_METADATA_OS_NAME_AND_BUILD: Operating system name and build.
NVME_CTRL_METADATA_SYS_PROD_NAME: System product name.
NVME_CTRL_METADATA_FIRMWARE_VERSION: Host firmware (e.g UEFI) version.
NVME_CTRL_METADATA_OS_DRIVER_FILENAME: Operating system driver filename.
NVME_CTRL_METADATA_DISPLAY_DRV_NAME: Display driver name.
NVME_CTRL_METADATA_DISPLAY_DRV_VERSION: Display driver version.
NVME_CTRL_METADATA_HOST_DET_FAIL_REC: Failure record.

enum nvme_ns_metadata_type¶: Namespace Metadata Element Types

Constants

NVME_NS_METADATA_OS_NS_NAME: Name of the namespace in the operating system
NVME_NS_METADATA_PRE_BOOT_NS_NAME: Name of the namespace in the pre-boot environment.
NVME_NS_METADATA_OS_NS_QUAL_1: First qualifier of the Operating System Namespace Name.
NVME_NS_METADATA_OS_NS_QUAL_2: Second qualifier of the Operating System Namespace Name.

struct nvme_timestamp¶: Timestamp - Data Structure for Get Features

Definition

struct nvme_timestamp {
  __u8 timestamp[6];
  __u8 attr;
  __u8 rsvd;
};

Members

timestamp: Timestamp value based on origin and synch field
attr: Attribute
rsvd: Reserved

struct nvme_lba_range_type_entry¶: LBA Range Type - Data Structure Entry

Definition

struct nvme_lba_range_type_entry {
  __u8 type;
  __u8 attributes;
  __u8 rsvd2[14];
  __u64 slba;
  __u64 nlb;
  __u8 guid[16];
  __u8 rsvd48[16];
};

Members

type: Specifies the Type of the LBA range
attributes: Specifies attributes of the LBA range
rsvd2: Reserved
slba: Starting LBA
nlb: Number of Logical Blocks
guid: Unique Identifier
rsvd48: Reserved

enum nvme_lbart¶: LBA Range Type - Data Structure Entry

Constants

NVME_LBART_TYPE_GP: General Purpose
NVME_LBART_TYPE_FS: Filesystem
NVME_LBART_TYPE_RAID: RAID
NVME_LBART_TYPE_CACHE: Cache
NVME_LBART_TYPE_SWAP: Page / swap file
NVME_LBART_ATTRIB_TEMP: Temp
NVME_LBART_ATTRIB_HIDE: Hidden

struct nvme_lba_range_type¶: LBA Range Type

Definition

struct nvme_lba_range_type {
  struct nvme_lba_range_type_entry entry[NVME_FEAT_LBA_RANGE_MAX];
};

Members

entry: LBA range type entry. See struct nvme_lba_range_type_entry

struct nvme_plm_config¶: Predictable Latency Mode - Deterministic Threshold Configuration Data Structure

Definition

struct nvme_plm_config {
  __le16 ee;
  __u8 rsvd2[30];
  __le64 dtwinrt;
  __le64 dtwinwt;
  __le64 dtwintt;
  __u8 rsvd56[456];
};

Members

ee: Enable Event
rsvd2: Reserved
dtwinrt: DTWIN Reads Threshold
dtwinwt: DTWIN Writes Threshold
dtwintt: DTWIN Time Threshold
rsvd56: Reserved

struct nvme_feat_host_behavior¶: Host Behavior Support - Data Structure

Definition

struct nvme_feat_host_behavior {
  __u8 acre;
  __u8 rsvd1[511];
};

Members

acre: Advanced Command Retry Enable
rsvd1: Reserved

enum nvme_host_behavior_support¶: Enable Advanced Command

Constants

NVME_ENABLE_ACRE: Enable Advanced Command Retry Enable

struct nvme_dsm_range¶: Dataset Management - Range Definition

Definition

struct nvme_dsm_range {
  __le32 cattr;
  __le32 nlb;
  __le64 slba;
};

Members

cattr: Context Attributes
nlb: Length in logical blocks
slba: Starting LBA

struct nvme_copy_range¶: Copy - Source Range Entries Descriptor Format

Definition

struct nvme_copy_range {
  __u8 rsvd0[8];
  __le64 slba;
  __le16 nlb;
  __u8 rsvd18[6];
  __le32 eilbrt;
  __le16 elbatm;
  __le16 elbat;
};

Members

rsvd0: Reserved
slba: Starting LBA
nlb: Number of Logical Blocks
rsvd18: Reserved
eilbrt: Expected Initial Logical Block Reference Tag / Expected Logical Block Storage Tag
elbatm: Expected Logical Block Application Tag Mask
elbat: Expected Logical Block Application Tag

struct nvme_copy_range_f1¶: Copy - Source Range Entries Descriptor Format 1h

Definition

struct nvme_copy_range_f1 {
  __u8 rsvd0[8];
  __le64 slba;
  __le16 nlb;
  __u8 rsvd18[8];
  __u8 elbt[10];
  __le16 elbatm;
  __le16 elbat;
};

Members

rsvd0: Reserved
slba: Starting LBA
nlb: Number of Logical Blocks
rsvd18: Reserved
elbt: Expected Initial Logical Block Reference Tag / Expected Logical Block Storage Tag
elbatm: Expected Logical Block Application Tag Mask
elbat: Expected Logical Block Application Tag

struct nvme_registered_ctrl¶: Registered Controller Data Structure

Definition

struct nvme_registered_ctrl {
  __le16 cntlid;
  __u8 rcsts;
  __u8 rsvd3[5];
  __le64 hostid;
  __le64 rkey;
};

Members

cntlid: Controller ID
rcsts: Reservation Status
rsvd3: Reserved
hostid: Host Identifier
rkey: Reservation Key

struct nvme_registered_ctrl_ext¶: Registered Controller Extended Data Structure

Definition

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

Members

cntlid: Controller ID
rcsts: Reservation Status
rsvd3: Reserved
rkey: Reservation Key
hostid: Host Identifier
rsvd32: Reserved

struct nvme_resv_status¶: Reservation Status Data Structure

Definition

struct nvme_resv_status {
  __le32 gen;
  __u8 rtype;
  __u8 regctl[2];
  __u8 rsvd7[2];
  __u8 ptpls;
  __u8 rsvd10[14];
  union {
    struct {
      __u8 rsvd24[40];
      struct nvme_registered_ctrl_ext regctl_eds[0];
    };
    struct nvme_registered_ctrl regctl_ds[0];
  };
};

Members

gen: Generation
rtype: Reservation Type
regctl: Number of Registered Controllers
rsvd7: Reserved
ptpls: Persist Through Power Loss State
rsvd10: Reserved
{unnamed_union}: anonymous
{unnamed_struct}: anonymous
rsvd24: Reserved
regctl_eds: Registered Controller Extended Data Structure
regctl_ds: Registered Controller Data Structure

struct nvme_streams_directive_params¶: Streams Directive - Return Parameters Data Structure

Definition

struct nvme_streams_directive_params {
  __le16 msl;
  __le16 nssa;
  __le16 nsso;
  __u8 nssc;
  __u8 rsvd[9];
  __le32 sws;
  __le16 sgs;
  __le16 nsa;
  __le16 nso;
  __u8 rsvd2[6];
};

Members

msl: Max Streams Limit
nssa: NVM Subsystem Streams Available
nsso: NVM Subsystem Streams Open
nssc: NVM Subsystem Stream Capability
rsvd: Reserved
sws: Stream Write Size
sgs: Stream Granularity Size
nsa: Namespace Streams Allocated
nso: Namespace Streams Open
rsvd2: Reserved

struct nvme_streams_directive_status¶: Streams Directive - Get Status Data Structure

Definition

struct nvme_streams_directive_status {
  __le16 osc;
  __le16 sid[];
};

Members

osc: Open Stream Count
sid: Stream Identifier

struct nvme_id_directives¶: Identify Directive - Return Parameters Data Structure

Definition

struct nvme_id_directives {
  __u8 supported[32];
  __u8 enabled[32];
  __u8 rsvd64[4032];
};

Members

supported: Identify directive is supported
enabled: Identify directive is Enabled
rsvd64: Reserved

enum nvme_directive_types¶: Directives Supported or Enabled

Constants

NVME_ID_DIR_ID_BIT: Identify directive is supported
NVME_ID_DIR_SD_BIT: Streams directive is supported

struct nvme_host_mem_buf_attrs¶: Host Memory Buffer - Attributes Data Structure

Definition

struct nvme_host_mem_buf_attrs {
  __le32 hsize;
  __le32 hmdlal;
  __le32 hmdlau;
  __le32 hmdlec;
  __u8 rsvd16[4080];
};

Members

hsize: Host Memory Buffer Size
hmdlal: Host Memory Descriptor List Lower Address
hmdlau: Host Memory Descriptor List Upper Address
hmdlec: Host Memory Descriptor List Entry Count
rsvd16: Reserved

enum nvme_ae_type¶: Asynchronous Event Type

Constants

NVME_AER_ERROR: Error event
NVME_AER_SMART: SMART / Health Status event
NVME_AER_NOTICE: Notice event
NVME_AER_CSS: NVM Command Set Specific events
NVME_AER_VS: Vendor Specific event

enum nvme_ae_info_error¶: Asynchronous Event Information - Error Status

Constants

NVME_AER_ERROR_INVALID_DB_REG: Write to Invalid Doorbell Register
NVME_AER_ERROR_INVALID_DB_VAL: Invalid Doorbell Write Value
NVME_AER_ERROR_DIAG_FAILURE: Diagnostic Failure
NVME_AER_ERROR_PERSISTENT_INTERNAL_ERROR: Persistent Internal Error
NVME_AER_ERROR_TRANSIENT_INTERNAL_ERROR: Transient Internal Error
NVME_AER_ERROR_FW_IMAGE_LOAD_ERROR: Firmware Image Load Error

enum nvme_ae_info_smart¶: Asynchronous Event Information - SMART / Health Status

Constants

NVME_AER_SMART_SUBSYSTEM_RELIABILITY: NVM subsystem Reliability
NVME_AER_SMART_TEMPERATURE_THRESHOLD: Temperature Threshold
NVME_AER_SMART_SPARE_THRESHOLD: Spare Below Threshold

enum nvme_ae_info_css_nvm¶: Asynchronous Event Information - I/O Command Specific Status

Constants

NVME_AER_CSS_NVM_RESERVATION: Reservation Log Page Available
NVME_AER_CSS_NVM_SANITIZE_COMPLETED: Sanitize Operation Completed
NVME_AER_CSS_NVM_UNEXPECTED_SANITIZE_DEALLOC: Sanitize Operation Completed With Unexpected Deallocation

enum nvme_ae_info_notice¶: Asynchronous Event Information - Notice

Constants

NVME_AER_NOTICE_NS_CHANGED: Namespace Attribute Changed
NVME_AER_NOTICE_FW_ACT_STARTING: Firmware Activation Starting
NVME_AER_NOTICE_TELEMETRY: Telemetry Log Changed
NVME_AER_NOTICE_ANA: Asymmetric Namespace Access Change
NVME_AER_NOTICE_PL_EVENT: Predictable Latency Event Aggregate Log Change
NVME_AER_NOTICE_LBA_STATUS_ALERT: LBA Status Information Alert
NVME_AER_NOTICE_EG_EVENT: Endurance Group Event Aggregate Log Page Change
NVME_AER_NOTICE_DISC_CHANGED: Discovery Log Page Change

enum nvme_subsys_type¶: Type of the NVM subsystem.

Constants

NVME_NQN_DISC: Discovery type target subsystem. Describes a referral to another Discovery Service composed of Discovery controllers that provide additional discovery records. Multiple Referral entries may be reported for each Discovery Service (if that Discovery Service has multiple NVM subsystem ports or supports multiple protocols).
NVME_NQN_NVME: NVME type target subsystem. Describes an NVM subsystem whose controllers may have attached namespaces (an NVM subsystem that is not composed of Discovery controllers). Multiple NVM Subsystem entries may be reported for each NVM subsystem if that NVM subsystem has multiple NVM subsystem ports.
NVME_NQN_CURR: Current Discovery type target subsystem. Describes this Discovery subsystem (the Discovery Service that contains the controller processing the Get Log Page command). Multiple Current Discovery Subsystem entries may be reported for this Discovery subsystem if the current Discovery subsystem has multiple NVM subsystem ports.

enum nvmf_disc_eflags¶: Discovery Log Page entry flags.

Constants

NVMF_DISC_EFLAGS_NONE: Indicates that none of the DUPRETINFO or EPCSD features are supported.
NVMF_DISC_EFLAGS_DUPRETINFO: Duplicate Returned Information (DUPRETINFO): Indicates that using the content of this entry to access this Discovery Service returns the same information that is returned by using the content of other entries in this log page that also have this flag set.
NVMF_DISC_EFLAGS_EPCSD: Explicit Persistent Connection Support for Discovery (EPCSD): Indicates that Explicit Persistent Connections are supported for the Discovery controller.
NVMF_DISC_EFLAGS_NCC: No CDC Connectivity (NCC): If set to ‘1’, then no DDC that describes this entry is currently connected to the CDC. If cleared to ‘0’, then at least one DDC that describes this entry is currently connected to the CDC. If the Discovery controller returning this log page is not a CDC, then this bit shall be cleared to ‘0’ and should be ignored by the host.

union nvmf_tsas¶: Transport Specific Address Subtype

Definition

union nvmf_tsas {
  char common[NVMF_TSAS_SIZE];
  struct rdma {
    __u8 qptype;
    __u8 prtype;
    __u8 cms;
    __u8 rsvd3[5];
    __u16 pkey;
    __u8 rsvd10[246];
  } rdma;
  struct tcp {
    __u8 sectype;
  } tcp;
};

Members

common: Common transport specific attributes
rdma: RDMA transport specific attribute settings
tcp: TCP transport specific attribute settings

struct nvmf_disc_log_entry¶: Discovery Log Page entry

Definition

struct nvmf_disc_log_entry {
  __u8 trtype;
  __u8 adrfam;
  __u8 subtype;
  __u8 treq;
  __le16 portid;
  __le16 cntlid;
  __le16 asqsz;
  __le16 eflags;
  __u8 rsvd12[20];
  char trsvcid[NVMF_TRSVCID_SIZE];
  __u8 rsvd64[192];
  char subnqn[NVME_NQN_LENGTH];
  char traddr[NVMF_TRADDR_SIZE];
  union nvmf_tsas tsas;
};

Members

trtype: Transport Type (TRTYPE): Specifies the NVMe Transport type. See enum nvmf_trtype.
adrfam: Address Family (ADRFAM): Specifies the address family. See enum nvmf_addr_family.
subtype: Subsystem Type (SUBTYPE): Specifies the type of the NVM subsystem that is indicated in this entry. See enum nvme_subsys_type.
treq: Transport Requirements (TREQ): Indicates requirements for the NVMe Transport. See enum nvmf_treq.
portid: Port ID (PORTID): Specifies a particular NVM subsystem port. Different NVMe Transports or address families may utilize the same Port ID value (e.g. a Port ID may support both iWARP and RoCE).
cntlid: Controller ID (CNTLID): Specifies the controller ID. If the NVM subsystem uses a dynamic controller model, then this field shall be set to FFFFh. If the NVM subsystem uses a static controller model, then this field may be set to a specific controller ID (values 0h to FFEFh are valid). If the NVM subsystem uses a static controller model and the value indicated is FFFEh, then the host should remember the Controller ID returned as part of the Fabrics Connect command in order to re-establish an association in the future with the same controller.
asqsz: Admin Max SQ Size (ASQSZ): Specifies the maximum size of an Admin Submission Queue. This applies to all controllers in the NVM subsystem. The value shall be a minimum of 32 entries.
eflags: Entry Flags (EFLAGS): Indicates additional information related to the current entry. See enum nvmf_disc_eflags.
rsvd12: Reserved
trsvcid: Transport Service Identifier (TRSVCID): Specifies the NVMe Transport service identifier as an ASCII string. The NVMe Transport service identifier is specified by the associated NVMe Transport binding specification.
rsvd64: Reserved
subnqn: NVM Subsystem Qualified Name (SUBNQN): NVMe Qualified Name (NQN) that uniquely identifies the NVM subsystem. For a subsystem, if that Discovery subsystem has a unique NQN (i.e., the NVM Subsystem NVMe Qualified Name (SUBNQN) field in that Discovery subsystem’s Identify Controller data structure contains a unique NQN value), then the value returned shall be that unique NQN. If the Discovery subsystem does not have a unique NQN, then the value returned shall be the well-known Discovery Service NQN (nqn.2014-08.org.nvmexpress.discovery).
traddr: Transport Address (TRADDR): Specifies the address of the NVM subsystem that may be used for a Connect command as an ASCII string. The Address Family field describes the reference for parsing this field.
tsas: Transport specific attribute settings

enum nvmf_trtype¶: Transport Type codes for Discovery Log Page entry TRTYPE field

Constants

NVMF_TRTYPE_UNSPECIFIED: Not indicated
NVMF_TRTYPE_RDMA: RDMA
NVMF_TRTYPE_FC: Fibre Channel
NVMF_TRTYPE_TCP: TCP
NVMF_TRTYPE_LOOP: Intra-host Transport (i.e., loopback), reserved for host usage.
NVMF_TRTYPE_MAX: Maximum value for enum nvmf_trtype

enum nvmf_addr_family¶: Address Family codes for Discovery Log Page entry ADRFAM field

Constants

NVMF_ADDR_FAMILY_PCI: PCIe
NVMF_ADDR_FAMILY_IP4: AF_INET: IPv4 address family.
NVMF_ADDR_FAMILY_IP6: AF_INET6: IPv6 address family.
NVMF_ADDR_FAMILY_IB: AF_IB: InfiniBand address family.
NVMF_ADDR_FAMILY_FC: Fibre Channel address family.
NVMF_ADDR_FAMILY_LOOP: Intra-host Transport (i.e., loopback), reserved for host usage.

enum nvmf_treq¶: Transport Requirements codes for Discovery Log Page entry TREQ field

Constants

NVMF_TREQ_NOT_SPECIFIED: Not specified
NVMF_TREQ_REQUIRED: Required
NVMF_TREQ_NOT_REQUIRED: Not Required
NVMF_TREQ_DISABLE_SQFLOW: SQ flow control disable supported

enum nvmf_rdma_qptype¶: RDMA QP Service Type codes for Discovery Log Page entry TSAS RDMA_QPTYPE field

Constants

NVMF_RDMA_QPTYPE_CONNECTED: Reliable Connected
NVMF_RDMA_QPTYPE_DATAGRAM: Reliable Datagram

enum nvmf_rdma_prtype¶: RDMA Provider Type codes for Discovery Log Page entry TSAS RDMA_PRTYPE field

Constants

NVMF_RDMA_PRTYPE_NOT_SPECIFIED: No Provider Specified
NVMF_RDMA_PRTYPE_IB: InfiniBand
NVMF_RDMA_PRTYPE_ROCE: InfiniBand RoCE
NVMF_RDMA_PRTYPE_ROCEV2: InfiniBand RoCEV2
NVMF_RDMA_PRTYPE_IWARP: iWARP

enum nvmf_rdma_cms¶: RDMA Connection Management Service Type codes for Discovery Log Page entry TSAS RDMA_CMS field

Constants

NVMF_RDMA_CMS_RDMA_CM: Sockets based endpoint addressing

enum nvmf_tcp_sectype¶: Transport Specific Address Subtype Definition for NVMe/TCP Transport

Constants

NVMF_TCP_SECTYPE_NONE: No Security
NVMF_TCP_SECTYPE_TLS: Transport Layer Security version 1.2
NVMF_TCP_SECTYPE_TLS13: Transport Layer Security version 1.3 or a subsequent version. The TLS protocol negotiates the version and cipher suite for each TCP connection.

enum nvmf_log_discovery_lid_support¶: Discovery log specific support

Constants

NVMF_LOG_DISC_LID_NONE: None
NVMF_LOG_DISC_LID_EXTDLPES: Extended Discovery Log Page Entries Supported
NVMF_LOG_DISC_LID_PLEOS: Port Local Entries Only Supported
NVMF_LOG_DISC_LID_ALLSUBES: All NVM Subsystem Entries Supported

enum nvmf_log_discovery_lsp¶: Discovery log specific field

Constants

NVMF_LOG_DISC_LSP_NONE: None
NVMF_LOG_DISC_LSP_EXTDLPE: Extended Discovery Log Page Entries
NVMF_LOG_DISC_LSP_PLEO: Port Local Entries Only
NVMF_LOG_DISC_LSP_ALLSUBE: All NVM Subsystem Entries

struct nvmf_discovery_log¶: Discovery Log Page (Log Identifier 70h)

Definition

struct nvmf_discovery_log {
  __le64 genctr;
  __le64 numrec;
  __le16 recfmt;
  __u8 rsvd14[1006];
  struct nvmf_disc_log_entry entries[];
};

Members

genctr: Generation Counter (GENCTR): Indicates the version of the discovery information, starting at a value of 0h. For each change in the Discovery Log Page, this counter is incremented by one. If the value of this field is FFFFFFFF_FFFFFFFFh, then the field shall be cleared to 0h when incremented (i.e., rolls over to 0h).
numrec: Number of Records (NUMREC): Indicates the number of records contained in the log.
recfmt: Record Format (RECFMT): Specifies the format of the Discovery Log Page. If a new format is defined, this value is incremented by one. The format of the record specified in this definition shall be 0h.
rsvd14: Reserved
entries: Discovery Log Page Entries - see struct nvmf_disc_log_entry.

enum nvmf_dim_tas¶: Discovery Information Management Task

Constants

NVMF_DIM_TAS_REGISTER: Register
NVMF_DIM_TAS_DEREGISTER: Deregister
NVMF_DIM_TAS_UPDATE: Update

enum nvmf_dim_entfmt¶: Discovery Information Management Entry Format

Constants

NVMF_DIM_ENTFMT_BASIC: Basic discovery information entry
NVMF_DIM_ENTFMT_EXTENDED: Extended discovery information entry

enum nvmf_dim_etype¶: Discovery Information Management Entity Type

Constants

NVMF_DIM_ETYPE_HOST: Host
NVMF_DIM_ETYPE_DDC: Direct Discovery controller
NVMF_DIM_ETYPE_CDC: Centralized Discovery controller

enum nvmf_exattype¶: Extended Attribute Type

Constants

NVMF_EXATTYPE_HOSTID: Host Identifier
NVMF_EXATTYPE_SYMNAME: Symblic Name

struct nvmf_ext_attr¶: Extended Attribute (EXAT)

Definition

struct nvmf_ext_attr {
  __le16 exattype;
  __le16 exatlen;
  __u8 exatval[];
};

Members

exattype: Extended Attribute Type (EXATTYPE) - see enum nvmf_exattype
exatlen: Extended Attribute Length (EXATLEN)
exatval: Extended Attribute Value (EXATVAL) - size allocated for array must be a multiple of 4 bytes

struct nvmf_ext_die¶: Extended Discovery Information Entry (DIE)

Definition

struct nvmf_ext_die {
  __u8 trtype;
  __u8 adrfam;
  __u8 subtype;
  __u8 treq;
  __le16 portid;
  __le16 cntlid;
  __le16 asqsz;
  __u8 rsvd10[22];
  char trsvcid[NVMF_TRSVCID_SIZE];
  __u8 resv64[192];
  char nqn[NVME_NQN_LENGTH];
  char traddr[NVMF_TRADDR_SIZE];
  union nvmf_tsas         tsas;
  __le32 tel;
  __le16 numexat;
  __u8 resv1030[2];
  struct nvmf_ext_attr    exat[];
};

Members

trtype: Transport Type (enum nvmf_trtype)
adrfam: Address Family (enum nvmf_addr_family)
subtype: Subsystem Type (enum nvme_subsys_type)
treq: Transport Requirements (enum nvmf_treq)
portid: Port ID
cntlid: Controller ID
asqsz: Admin Max SQ Size
rsvd10: Reserved
trsvcid: Transport Service Identifier
resv64: Reserved
nqn: NVM Qualified Name
traddr: Transport Address
tsas: Transport Specific Address Subtype (union nvmf_tsas)
tel: Total Entry Length
numexat: Number of Extended Attributes
resv1030: Reserved
exat: Extended Attributes 0 (struct nvmf_ext_attr)

union nvmf_die¶: Discovery Information Entry (DIE)

Definition

union nvmf_die {
  struct nvmf_disc_log_entry      basic[0];
  struct nvmf_ext_die             extended;
};

Members

basic: Basic format (struct nvmf_disc_log_entry)
extended: Extended format (struct nvmf_ext_die)

Description

Depending on the ENTFMT specified in the DIM, DIEs can be entered with the Basic or Extended formats. For Basic format, each entry has a fixed length. Therefore, the “basic” field defined below can be accessed as a C array. For the Extended format, however, each entry is of variable length (TEL). Therefore, the “extended” field defined below cannot be accessed as a C array. Instead, the “extended” field is akin to a linked-list, where one can “walk” through the list. To move to the next entry, one simply adds the current entry’s length (TEL) to the “walk” pointer. The number of entries in the list is specified by NUMENT. Although extended entries are of a variable lengths (TEL), TEL is always a multiple of 4 bytes.

struct nvmf_dim_data¶: Discovery Information Management (DIM) - Data

Definition

struct nvmf_dim_data {
  __le32 tdl;
  __u8 rsvd4[4];
  __le64 nument;
  __le16 entfmt;
  __le16 etype;
  __u8 portlcl;
  __u8 rsvd21;
  __le16 ektype;
  char eid[NVME_NQN_LENGTH];
  char ename[NVMF_ENAME_LEN];
  char ever[NVMF_EVER_LEN];
  __u8 rsvd600[424];
  union nvmf_die  die[];
};

Members

tdl: Total Data Length
rsvd4: Reserved
nument: Number of entries
entfmt: Entry Format (enum nvmf_dim_entfmt)
etype: Entity Type (enum nvmf_dim_etype)
portlcl: Port Local
rsvd21: Reserved
ektype: Entry Key Type
eid: Entity Identifier (e.g. Host NQN)
ename: Entity Name (e.g. hostname)
ever: Entity Version (e.g. OS Name/Version)
rsvd600: Reserved
die: Discovery Information Entry (see nument above)

struct nvmf_connect_data¶: Data payload for the ‘connect’ command

Definition

struct nvmf_connect_data {
  __u8 hostid[16];
  __le16 cntlid;
  char rsvd4[238];
  char subsysnqn[NVME_NQN_LENGTH];
  char hostnqn[NVME_NQN_LENGTH];
  char rsvd5[256];
};

Members

hostid: Host ID of the connecting host
cntlid: Requested controller ID
rsvd4: Reserved
subsysnqn: Subsystem NQN to connect to
hostnqn: Host NQN of the connecting host
rsvd5: Reserved

struct nvme_mi_read_nvm_ss_info¶: NVM Subsystem Information Data Structure

Definition

struct nvme_mi_read_nvm_ss_info {
  __u8 nump;
  __u8 mjr;
  __u8 mnr;
  __u8 rsvd3[29];
};

Members

nump: Number of Ports
mjr: NVMe-MI Major Version Number
mnr: NVMe-MI Minor Version Number
rsvd3: Reserved

struct nvme_mi_port_pcie¶: PCIe Port Specific Data

Definition

struct nvme_mi_port_pcie {
  __u8 mps;
  __u8 sls;
  __u8 cls;
  __u8 mlw;
  __u8 nlw;
  __u8 pn;
  __u8 rsvd14[18];
};

Members

mps: PCIe Maximum Payload Size
sls: PCIe Supported Link Speeds Vector
cls: PCIe Current Link Speed
mlw: PCIe Maximum Link Width
nlw: PCIe Negotiated Link Width
pn: PCIe Port Number
rsvd14: Reserved

struct nvme_mi_port_smb¶: SMBus Port Specific Data

Definition

struct nvme_mi_port_smb {
  __u8 vpd_addr;
  __u8 mvpd_freq;
  __u8 mme_addr;
  __u8 mme_freq;
  __u8 nvmebm;
  __u8 rsvd13[19];
};

Members

vpd_addr: Current VPD SMBus/I2C Address
mvpd_freq: Maximum VPD Access SMBus/I2C Frequency
mme_addr: Current Management Endpoint SMBus/I2C Address
mme_freq: Maximum Management Endpoint SMBus/I2C Frequency
nvmebm: NVMe Basic Management
rsvd13: Reserved

struct nvme_mi_read_port_info¶: Port Information Data Structure

Definition

struct nvme_mi_read_port_info {
  __u8 portt;
  __u8 rsvd1;
  __le16 mmctptus;
  __le32 meb;
  union {
    struct nvme_mi_port_pcie pcie;
    struct nvme_mi_port_smb smb;
  };
};

Members

portt: Port Type
rsvd1: Reserved
mmctptus: Maximum MCTP Transmission Unit Size
meb: Management Endpoint Buffer Size
{unnamed_union}: anonymous
pcie: PCIe Port Specific Data
smb: SMBus Port Specific Data

struct nvme_mi_read_ctrl_info¶: Controller Information Data Structure

Definition

struct nvme_mi_read_ctrl_info {
  __u8 portid;
  __u8 rsvd1[4];
  __u8 prii;
  __le16 pri;
  __le16 vid;
  __le16 did;
  __le16 ssvid;
  __le16 ssid;
  __u8 rsvd16[16];
};

Members

portid: Port Identifier
rsvd1: Reserved
prii: PCIe Routing ID Information
pri: PCIe Routing ID
vid: PCI Vendor ID
did: PCI Device ID
ssvid: PCI Subsystem Vendor ID
ssid: PCI Subsystem Device ID
rsvd16: Reserved

struct nvme_mi_osc¶: Optionally Supported Command Data Structure

Definition

struct nvme_mi_osc {
  __u8 type;
  __u8 opc;
};

Members

type: Command Type
opc: Opcode

struct nvme_mi_read_sc_list¶: Management Endpoint Buffer Supported Command List Data Structure

Definition

struct nvme_mi_read_sc_list {
  __le16 numcmd;
  struct nvme_mi_osc cmds[];
};

Members

numcmd: Number of Commands
cmds: MEB supported Command Data Structure. See struct nvme_mi_osc

struct nvme_mi_nvm_ss_health_status¶: Subsystem Management Data Structure

Definition

struct nvme_mi_nvm_ss_health_status {
  __u8 nss;
  __u8 sw;
  __u8 ctemp;
  __u8 pdlu;
  __le16 ccs;
  __u8 rsvd8[2];
};

Members

nss: NVM Subsystem Status
sw: Smart Warnings
ctemp: Composite Temperature
pdlu: Percentage Drive Life Used
ccs: Composite Controller Status
rsvd8: Reserved

enum nvme_mi_ccs¶: Get State Control Primitive Success Response Fields - Control Primitive Specific Response

Constants

NVME_MI_CCS_RDY: Ready
NVME_MI_CCS_CFS: Controller Fatal Status
NVME_MI_CCS_SHST: Shutdown Status
NVME_MI_CCS_NSSRO: NVM Subsystem Reset Occurred
NVME_MI_CCS_CECO: Controller Enable Change Occurred
NVME_MI_CCS_NAC: Namespace Attribute Changed
NVME_MI_CCS_FA: Firmware Activated
NVME_MI_CCS_CSTS: Controller Status Change
NVME_MI_CCS_CTEMP: Composite Temperature Change
NVME_MI_CCS_PDLU: Percentage Used
NVME_MI_CCS_SPARE: Available Spare
NVME_MI_CCS_CCWARN: Critical Warning

struct nvme_mi_ctrl_health_status¶: Controller Health Data Structure (CHDS)

Definition

struct nvme_mi_ctrl_health_status {
  __le16 ctlid;
  __le16 csts;
  __le16 ctemp;
  __u8 pdlu;
  __u8 spare;
  __u8 cwarn;
  __u8 rsvd9[7];
};

Members

ctlid: Controller Identifier
csts: Controller Status
ctemp: Composite Temperature
pdlu: Percentage Used
spare: Available Spare
cwarn: Critical Warning
rsvd9: Reserved

enum nvme_mi_csts¶: Controller Health Data Structure (CHDS) - Controller Status (CSTS)

Constants

NVME_MI_CSTS_RDY: Ready
NVME_MI_CSTS_CFS: Controller Fatal Status
NVME_MI_CSTS_SHST: Shutdown Status
NVME_MI_CSTS_NSSRO: NVM Subsystem Reset Occurred
NVME_MI_CSTS_CECO: Controller Enable Change Occurred
NVME_MI_CSTS_NAC: Namespace Attribute Changed
NVME_MI_CSTS_FA: Firmware Activated

enum nvme_mi_cwarn¶: Controller Health Data Structure (CHDS) - Critical Warning (CWARN)

Constants

NVME_MI_CWARN_ST: Spare Threshold
NVME_MI_CWARN_TAUT: Temperature Above or Under Threshold
NVME_MI_CWARN_RD: Reliability Degraded
NVME_MI_CWARN_RO: Read Only
NVME_MI_CWARN_VMBF: Volatile Memory Backup Failed

struct nvme_mi_vpd_mra¶: NVMe MultiRecord Area

Definition

struct nvme_mi_vpd_mra {
  __u8 nmravn;
  __u8 ff;
  __u8 rsvd7[6];
  __u8 i18vpwr;
  __u8 m18vpwr;
  __u8 i33vpwr;
  __u8 m33vpwr;
  __u8 rsvd17;
  __u8 m33vapsr;
  __u8 i5vapsr;
  __u8 m5vapsr;
  __u8 i12vapsr;
  __u8 m12vapsr;
  __u8 mtl;
  __u8 tnvmcap[16];
  __u8 rsvd37[27];
};

Members

nmravn: NVMe MultiRecord Area Version Number
ff: Form Factor
rsvd7: Reserved
i18vpwr: Initial 1.8 V Power Supply Requirements
m18vpwr: Maximum 1.8 V Power Supply Requirements
i33vpwr: Initial 3.3 V Power Supply Requirements
m33vpwr: Maximum 3.3 V Power Supply Requirements
rsvd17: Reserved
m33vapsr: Maximum 3.3 Vi aux Power Supply Requirements
i5vapsr: Initial 5 V Power Supply Requirements
m5vapsr: Maximum 5 V Power Supply Requirements
i12vapsr: Initial 12 V Power Supply Requirements
m12vapsr: Maximum 12 V Power Supply Requirements
mtl: Maximum Thermal Load
tnvmcap: Total NVM Capacity
rsvd37: Reserved

struct nvme_mi_vpd_ppmra¶: NVMe PCIe Port MultiRecord Area

Definition

struct nvme_mi_vpd_ppmra {
  __u8 nppmravn;
  __u8 pn;
  __u8 ppi;
  __u8 ls;
  __u8 mlw;
  __u8 mctp;
  __u8 refccap;
  __u8 pi;
  __u8 rsvd13[3];
};

Members

nppmravn: NVMe PCIe Port MultiRecord Area Version Number
pn: PCIe Port Number
ppi: Port Information
ls: PCIe Link Speed
mlw: PCIe Maximum Link Width
mctp: MCTP Support
refccap: Ref Clk Capability
pi: Port Identifier
rsvd13: Reserved

struct nvme_mi_vpd_telem¶: Vital Product Data Element Descriptor

Definition

struct nvme_mi_vpd_telem {
  __u8 type;
  __u8 rev;
  __u8 len;
  __u8 data[0];
};

Members

type: Type of the Element Descriptor
rev: Revision of the Element Descriptor
len: Number of bytes in the Element Descriptor
data: Type-specific information associated with the Element Descriptor

enum nvme_mi_elem¶: Element Descriptor Types

Constants

NVME_MI_ELEM_EED: Extended Element Descriptor
NVME_MI_ELEM_USCE: Upstream Connector Element Descriptor
NVME_MI_ELEM_ECED: Expansion Connector Element Descriptor
NVME_MI_ELEM_LED: Label Element Descriptor
NVME_MI_ELEM_SMBMED: SMBus/I2C Mux Element Descriptor
NVME_MI_ELEM_PCIESED: PCIe Switch Element Descriptor
NVME_MI_ELEM_NVMED: NVM Subsystem Element Descriptor

struct nvme_mi_vpd_tra¶: Vital Product Data Topology MultiRecord

Definition

struct nvme_mi_vpd_tra {
  __u8 vn;
  __u8 rsvd6;
  __u8 ec;
  struct nvme_mi_vpd_telem elems[0];
};

Members

vn: Version Number
rsvd6: Reserved
ec: Element Count
elems: Element Descriptor

struct nvme_mi_vpd_mr_common¶: NVMe MultiRecord Area

Definition

struct nvme_mi_vpd_mr_common {
  __u8 type;
  __u8 rf;
  __u8 rlen;
  __u8 rchksum;
  __u8 hchksum;
  union {
    struct nvme_mi_vpd_mra nmra;
    struct nvme_mi_vpd_ppmra ppmra;
    struct nvme_mi_vpd_tra tmra;
  };
};

Members

type: NVMe Record Type ID
rf: Record Format
rlen: Record Length
rchksum: Record Checksum
hchksum: Header Checksum
{unnamed_union}: anonymous
nmra: NVMe MultiRecord Area
ppmra: NVMe PCIe Port MultiRecord Area
tmra: Topology MultiRecord Area

struct nvme_mi_vpd_hdr¶: Vital Product Data Common Header

Definition

struct nvme_mi_vpd_hdr {
  __u8 ipmiver;
  __u8 iuaoff;
  __u8 ciaoff;
  __u8 biaoff;
  __u8 piaoff;
  __u8 mrioff;
  __u8 rsvd6;
  __u8 chchk;
  __u8 vpd[];
};

Members

ipmiver: IPMI Format Version Number
iuaoff: Internal Use Area Starting Offset
ciaoff: Chassis Info Area Starting Offset
biaoff: Board Info Area Starting Offset
piaoff: Product Info Area Starting Offset
mrioff: MultiRecord Info Area Starting Offset
rsvd6: Reserved
chchk: Common Header Checksum
vpd: Vital Product Data

enum nvme_status_field¶: Defines all parts of the nvme status field: status code, status code type, and additional flags.

Constants

NVME_SCT_GENERIC: Generic errors applicable to multiple opcodes
NVME_SCT_CMD_SPECIFIC: Errors associated to a specific opcode
NVME_SCT_MEDIA: Errors associated with media and data integrity
NVME_SCT_PATH: Errors associated with the paths connection
NVME_SCT_VS: Vendor specific errors
NVME_SCT_MASK: Mask to get the value of the Status Code Type
NVME_SCT_SHIFT: Shift value to get the value of the Status Code Type
NVME_SC_MASK: Mask to get the value of the status code.
NVME_SC_SHIFT: Shift value to get the value of the status code.
NVME_SC_SUCCESS: Successful Completion: The command completed without error.
NVME_SC_INVALID_OPCODE: Invalid Command Opcode: A reserved coded value or an unsupported value in the command opcode field.
NVME_SC_INVALID_FIELD: Invalid Field in Command: A reserved coded value or an unsupported value in a defined field.
NVME_SC_CMDID_CONFLICT: Command ID Conflict: The command identifier is already in use.
NVME_SC_DATA_XFER_ERROR: Data Transfer Error: Transferring the data or metadata associated with a command experienced an error.
NVME_SC_POWER_LOSS: Commands Aborted due to Power Loss Notification: Indicates that the command was aborted due to a power loss notification.
NVME_SC_INTERNAL: Internal Error: The command was not completed successfully due to an internal error.
NVME_SC_ABORT_REQ: Command Abort Requested: The command was aborted due to an Abort command being received that specified the Submission Queue Identifier and Command Identifier of this command.
NVME_SC_ABORT_QUEUE: Command Aborted due to SQ Deletion: The command was aborted due to a Delete I/O Submission Queue request received for the Submission Queue to which the command was submitted.
NVME_SC_FUSED_FAIL: Command Aborted due to Failed Fused Command: The command was aborted due to the other command in a fused operation failing.
NVME_SC_FUSED_MISSING: Aborted due to Missing Fused Command: The fused command was aborted due to the adjacent submission queue entry not containing a fused command that is the other command.
NVME_SC_INVALID_NS: Invalid Namespace or Format: The namespace or the format of that namespace is invalid.
NVME_SC_CMD_SEQ_ERROR: Command Sequence Error: The command was aborted due to a protocol violation in a multi-command sequence.
NVME_SC_SGL_INVALID_LAST: Invalid SGL Segment Descriptor: The command includes an invalid SGL Last Segment or SGL Segment descriptor.
NVME_SC_SGL_INVALID_COUNT: Invalid Number of SGL Descriptors: There is an SGL Last Segment descriptor or an SGL Segment descriptor in a location other than the last descriptor of a segment based on the length indicated.
NVME_SC_SGL_INVALID_DATA: Data SGL Length Invalid: This may occur if the length of a Data SGL is too short. This may occur if the length of a Data SGL is too long and the controller does not support SGL transfers longer than the amount of data to be transferred as indicated in the SGL Support field of the Identify Controller data structure.
NVME_SC_SGL_INVALID_METADATA: Metadata SGL Length Invalid: This may occur if the length of a Metadata SGL is too short. This may occur if the length of a Metadata SGL is too long and the controller does not support SGL transfers longer than the amount of data to be transferred as indicated in the SGL Support field of the Identify Controller data structure.
NVME_SC_SGL_INVALID_TYPE: SGL Descriptor Type Invalid: The type of an SGL Descriptor is a type that is not supported by the controller.
NVME_SC_CMB_INVALID_USE: Invalid Use of Controller Memory Buffer: The attempted use of the Controller Memory Buffer is not supported by the controller.
NVME_SC_PRP_INVALID_OFFSET: PRP Offset Invalid: The Offset field for a PRP entry is invalid.
NVME_SC_AWU_EXCEEDED: Atomic Write Unit Exceeded: The length specified exceeds the atomic write unit size.
NVME_SC_OP_DENIED: Operation Denied: The command was denied due to lack of access rights. Refer to the appropriate security specification.
NVME_SC_SGL_INVALID_OFFSET: SGL Offset Invalid: The offset specified in a descriptor is invalid. This may occur when using capsules for data transfers in NVMe over Fabrics implementations and an invalid offset in the capsule is specified.
NVME_SC_HOSTID_FORMAT: Host Identifier Inconsistent Format: The NVM subsystem detected the simultaneous use of 64- bit and 128-bit Host Identifier values on different controllers.
NVME_SC_KAT_EXPIRED: Keep Alive Timer Expired: The Keep Alive Timer expired.
NVME_SC_KAT_INVALID: Keep Alive Timeout Invalid: The Keep Alive Timeout value specified is invalid.
NVME_SC_CMD_ABORTED_PREMEPT: Command Aborted due to Preempt and Abort: The command was aborted due to a Reservation Acquire command.
NVME_SC_SANITIZE_FAILED: Sanitize Failed: The most recent sanitize operation failed and no recovery action has been successfully completed.
NVME_SC_SANITIZE_IN_PROGRESS: Sanitize In Progress: The requested function (e.g., command) is prohibited while a sanitize operation is in progress.
NVME_SC_SGL_INVALID_GRANULARITY: SGL Data Block Granularity Invalid: The Address alignment or Length granularity for an SGL Data Block descriptor is invalid.
NVME_SC_CMD_IN_CMBQ_NOT_SUPP: Command Not Supported for Queue in CMB: The implementation does not support submission of the command to a Submission Queue in the Controller Memory Buffer or command completion to a Completion Queue in the Controller Memory Buffer.
NVME_SC_NS_WRITE_PROTECTED: Namespace is Write Protected: The command is prohibited while the namespace is write protected as a result of a change in the namespace write protection state as defined by the Namespace Write Protection State Machine.
NVME_SC_CMD_INTERRUPTED: Command Interrupted: Command processing was interrupted and the controller is unable to successfully complete the command. The host should retry the command.
NVME_SC_TRAN_TPORT_ERROR: Transient Transport Error: A transient transport error was detected. If the command is retried on the same controller, the command is likely to succeed. A command that fails with a transient transport error four or more times should be treated as a persistent transport error that is not likely to succeed if retried on the same controller.
NVME_SC_PROHIBITED_BY_CMD_AND_FEAT: Command Prohibited by Command and Feature Lockdown: The command was aborted due to command execution being prohibited by the Command and Feature Lockdown.
NVME_SC_ADMIN_CMD_MEDIA_NOT_READY: Admin Command Media Not Ready: The Admin command requires access to media and the media is not ready.
NVME_SC_LBA_RANGE: LBA Out of Range: The command references an LBA that exceeds the size of the namespace.
NVME_SC_CAP_EXCEEDED: Capacity Exceeded: Execution of the command has caused the capacity of the namespace to be exceeded.
NVME_SC_NS_NOT_READY: Namespace Not Ready: The namespace is not ready to be accessed as a result of a condition other than a condition that is reported as an Asymmetric Namespace Access condition.
NVME_SC_RESERVATION_CONFLICT: Reservation Conflict: The command was aborted due to a conflict with a reservation held on the accessed namespace.
NVME_SC_FORMAT_IN_PROGRESS: Format In Progress: A Format NVM command is in progress on the namespace.
NVME_SC_CQ_INVALID: Completion Queue Invalid: The Completion Queue identifier specified in the command does not exist.
NVME_SC_QID_INVALID: Invalid Queue Identifier: The creation of the I/O Completion Queue failed due to an invalid queue identifier specified as part of the command. An invalid queue identifier is one that is currently in use or one that is outside the range supported by the controller.
NVME_SC_QUEUE_SIZE: Invalid Queue Size: The host attempted to create an I/O Completion Queue with an invalid number of entries.
NVME_SC_ABORT_LIMIT: Abort Command Limit Exceeded: The number of concurrently outstanding Abort commands has exceeded the limit indicated in the Identify Controller data structure.
NVME_SC_ABORT_MISSING: Abort Command is missing: The abort command is missing.
NVME_SC_ASYNC_LIMIT: Asynchronous Event Request Limit Exceeded: The number of concurrently outstanding Asynchronous Event Request commands has been exceeded.
NVME_SC_FIRMWARE_SLOT: Invalid Firmware Slot: The firmware slot indicated is invalid or read only. This error is indicated if the firmware slot exceeds the number supported.
NVME_SC_FIRMWARE_IMAGE: Invalid Firmware Image: The firmware image specified for activation is invalid and not loaded by the controller.
NVME_SC_INVALID_VECTOR: Invalid Interrupt Vector: The creation of the I/O Completion Queue failed due to an invalid interrupt vector specified as part of the command.
NVME_SC_INVALID_LOG_PAGE: Invalid Log Page: The log page indicated is invalid. This error condition is also returned if a reserved log page is requested.
NVME_SC_INVALID_FORMAT: Invalid Format: The LBA Format specified is not supported.
NVME_SC_FW_NEEDS_CONV_RESET: Firmware Activation Requires Conventional Reset: The firmware commit was successful, however, activation of the firmware image requires a conventional reset.
NVME_SC_INVALID_QUEUE: Invalid Queue Deletion: Invalid I/O Completion Queue specified to delete.
NVME_SC_FEATURE_NOT_SAVEABLE: Feature Identifier Not Saveable: The Feature Identifier specified does not support a saveable value.
NVME_SC_FEATURE_NOT_CHANGEABLE: Feature Not Changeable: The Feature Identifier is not able to be changed.
NVME_SC_FEATURE_NOT_PER_NS: Feature Not Namespace Specific: The Feature Identifier specified is not namespace specific. The Feature Identifier settings apply across all namespaces.
NVME_SC_FW_NEEDS_SUBSYS_RESET: Firmware Activation Requires NVM Subsystem Reset: The firmware commit was successful, however, activation of the firmware image requires an NVM Subsystem.
NVME_SC_FW_NEEDS_RESET: Firmware Activation Requires Controller Level Reset: The firmware commit was successful; however, the image specified does not support being activated without a reset.
NVME_SC_FW_NEEDS_MAX_TIME: Firmware Activation Requires Maximum Time Violation: The image specified if activated immediately would exceed the Maximum Time for Firmware Activation (MTFA) value reported in Identify Controller.
NVME_SC_FW_ACTIVATE_PROHIBITED: Firmware Activation Prohibited: The image specified is being prohibited from activation by the controller for vendor specific reasons.
NVME_SC_OVERLAPPING_RANGE: Overlapping Range: The downloaded firmware image has overlapping ranges.
NVME_SC_NS_INSUFFICIENT_CAP: Namespace Insufficient Capacity: Creating the namespace requires more free space than is currently available.
NVME_SC_NS_ID_UNAVAILABLE: Namespace Identifier Unavailable: The number of namespaces supported has been exceeded.
NVME_SC_NS_ALREADY_ATTACHED: Namespace Already Attached: The controller is already attached to the namespace specified.
NVME_SC_NS_IS_PRIVATE: Namespace Is Private: The namespace is private and is already attached to one controller.
NVME_SC_NS_NOT_ATTACHED: Namespace Not Attached: The request to detach the controller could not be completed because the controller is not attached to the namespace.
NVME_SC_THIN_PROV_NOT_SUPP: Thin Provisioning Not Supported: Thin provisioning is not supported by the controller.
NVME_SC_CTRL_LIST_INVALID: Controller List Invalid: The controller list provided contains invalid controller ids.
NVME_SC_SELF_TEST_IN_PROGRESS: Device Self-test In Progress: The controller or NVM subsystem already has a device self-test operation in process.
NVME_SC_BP_WRITE_PROHIBITED: Boot Partition Write Prohibited: The command is trying to modify a locked Boot Partition.
NVME_SC_INVALID_CTRL_ID: Invalid Controller Identifier:
NVME_SC_INVALID_SEC_CTRL_STATE: Invalid Secondary Controller State
NVME_SC_INVALID_CTRL_RESOURCES: Invalid Number of Controller Resources
NVME_SC_INVALID_RESOURCE_ID: Invalid Resource Identifier
NVME_SC_PMR_SAN_PROHIBITED: Sanitize Prohibited While Persistent Memory Region is Enabled
NVME_SC_ANA_GROUP_ID_INVALID: ANA Group Identifier Invalid: The specified ANA Group Identifier (ANAGRPID) is not supported in the submitted command.
NVME_SC_ANA_ATTACH_FAILED: ANA Attach Failed: The controller is not attached to the namespace as a result of an ANA condition.
NVME_SC_INSUFFICIENT_CAP: Insufficient Capacity: Requested operation requires more free space than is currently available.
NVME_SC_NS_ATTACHMENT_LIMIT_EXCEEDED: Namespace Attachment Limit Exceeded: Attaching the ns to a controller causes max number of ns attachments allowed to be exceeded.
NVME_SC_PROHIBIT_CMD_EXEC_NOT_SUPPORTED: Prohibition of Command Execution Not Supported
NVME_SC_IOCS_NOT_SUPPORTED: I/O Command Set Not Supported
NVME_SC_IOCS_NOT_ENABLED: I/O Command Set Not Enabled
NVME_SC_IOCS_COMBINATION_REJECTED: I/O Command Set Combination Rejected
NVME_SC_INVALID_IOCS: Invalid I/O Command Set
NVME_SC_ID_UNAVAILABLE: Identifier Unavailable
NVME_SC_INVALID_DISCOVERY_INFO: The discovery information provided in one or more extended discovery information entries is not applicable for the type of entity selected in the Entity Type (ETYPE) field of the Discovery Information Management command data portion’s header.
NVME_SC_ZONING_DATA_STRUCT_LOCKED: The requested Zoning data structure is locked on the CDC.
NVME_SC_ZONING_DATA_STRUCT_NOTFND: The requested Zoning data structure does not exist on the CDC.
NVME_SC_INSUFFICIENT_DISC_RES: The number of discover information entries provided in the data portion of the Discovery Information Management command for a registration task (i.e., TAS field cleared to 0h) exceeds the available capacity for new discovery information entries on the CDC or DDC. This may be a transient condition.
NVME_SC_REQSTD_FUNCTION_DISABLED: Fabric Zoning is not enabled on the CDC
NVME_SC_ZONEGRP_ORIGINATOR_INVLD: The NQN contained in the ZoneGroup Originator field does not match the Host NQN used by the DDC to connect to the CDC.
NVME_SC_BAD_ATTRIBUTES: Conflicting Dataset Management Attributes
NVME_SC_INVALID_PI: Invalid Protection Information
NVME_SC_READ_ONLY: Attempted Write to Read Only Range
NVME_SC_CMD_SIZE_LIMIT_EXCEEDED: Command Size Limit Exceeded
NVME_SC_CONNECT_FORMAT: Incompatible Format: The NVM subsystem does not support the record format specified by the host.
NVME_SC_CONNECT_CTRL_BUSY: Controller Busy: The controller is already associated with a host.
NVME_SC_CONNECT_INVALID_PARAM: Connect Invalid Parameters: One or more of the command parameters.
NVME_SC_CONNECT_RESTART_DISC: Connect Restart Discovery: The NVM subsystem requested is not available.
NVME_SC_CONNECT_INVALID_HOST: Connect Invalid Host: The host is either not allowed to establish an association to any controller in the NVM subsystem or the host is not allowed to establish an association to the specified controller
NVME_SC_DISCONNECT_INVALID_QTYPE: Invalid Queue Type: The command was sent on the wrong queue type.
NVME_SC_DISCOVERY_RESTART: Discover Restart: The snapshot of the records is now invalid or out of date.
NVME_SC_AUTH_REQUIRED: Authentication Required: NVMe in-band authentication is required and the queue has not yet been authenticated.
NVME_SC_ZNS_INVALID_OP_REQUEST: Invalid Zone Operation Request: The operation requested is invalid. This may be due to various conditions, including: attempting to allocate a ZRWA when a zone is not in the ZSE:Empty state; or invalid Flush Explicit ZRWA Range Send Zone Action operation.
NVME_SC_ZNS_ZRWA_RESOURCES_UNAVAILABLE: ZRWA Resources Unavailable: No ZRWAs are available.
NVME_SC_ZNS_BOUNDARY_ERROR: Zone Boundary Error: The command specifies logical blocks in more than one zone.
NVME_SC_ZNS_FULL: Zone Is Full: The accessed zone is in the ZSF:Full state.
NVME_SC_ZNS_READ_ONLY: Zone Is Read Only: The accessed zone is in the ZSRO:Read Only state.
NVME_SC_ZNS_OFFLINE: Zone Is Offline: The accessed zone is in the ZSO:Offline state.
NVME_SC_ZNS_INVALID_WRITE: Zone Invalid Write: The write to a zone was not at the write pointer.
NVME_SC_ZNS_TOO_MANY_ACTIVE: Too Many Active Zones: The controller does not allow additional active zones.
NVME_SC_ZNS_TOO_MANY_OPENS: Too Many Open Zones: The controller does not allow additional open zones.
NVME_SC_ZNS_INVAL_TRANSITION: Invalid Zone State Transition: The request is not a valid zone state transition.
NVME_SC_WRITE_FAULT: Write Fault: The write data could not be committed to the media.
NVME_SC_READ_ERROR: Unrecovered Read Error: The read data could not be recovered from the media.
NVME_SC_GUARD_CHECK: End-to-end Guard Check Error: The command was aborted due to an end-to-end guard check failure.
NVME_SC_APPTAG_CHECK: End-to-end Application Tag Check Error: The command was aborted due to an end-to-end application tag check failure.
NVME_SC_REFTAG_CHECK: End-to-end Reference Tag Check Error: The command was aborted due to an end-to-end reference tag check failure.
NVME_SC_COMPARE_FAILED: Compare Failure: The command failed due to a miscompare during a Compare command.
NVME_SC_ACCESS_DENIED: Access Denied: Access to the namespace and/or LBA range is denied due to lack of access rights.
NVME_SC_UNWRITTEN_BLOCK: Deallocated or Unwritten Logical Block: The command failed due to an attempt to read from or verify an LBA range containing a deallocated or unwritten logical block.
NVME_SC_STORAGE_TAG_CHECK: End-to-End Storage Tag Check Error: The command was aborted due to an end-to-end storage tag check failure.
NVME_SC_ANA_INTERNAL_PATH_ERROR: Internal Path Error: The command was not completed as the result of a controller internal error that is specific to the controller processing the command.
NVME_SC_ANA_PERSISTENT_LOSS: Asymmetric Access Persistent Loss: The requested function (e.g., command) is not able to be performed as a result of the relationship between the controller and the namespace being in the ANA Persistent Loss state.
NVME_SC_ANA_INACCESSIBLE: Asymmetric Access Inaccessible: The requested function (e.g., command) is not able to be performed as a result of the relationship between the controller and the namespace being in the ANA Inaccessible state.
NVME_SC_ANA_TRANSITION: Asymmetric Access Transition: The requested function (e.g., command) is not able to be performed as a result of the relationship between the controller and the namespace transitioning between Asymmetric Namespace Access states.
NVME_SC_CTRL_PATH_ERROR: Controller Pathing Error: A pathing error was detected by the controller.
NVME_SC_HOST_PATH_ERROR: Host Pathing Error: A pathing error was detected by the host.
NVME_SC_CMD_ABORTED_BY_HOST: Command Aborted By Host: The command was aborted as a result of host action.
NVME_SC_CRD: Mask to get value of Command Retry Delay index
NVME_SC_MORE: More bit. If set, more status information for this command as part of the Error Information log that may be retrieved with the Get Log Page command.
NVME_SC_DNR: Do Not Retry bit. If set, if the same command is re-submitted to any controller in the NVM subsystem, then that re-submitted command is expected to fail.

__u16 nvme_status_code_type(__u16 status_field)¶: Returns the NVMe Status Code Type

Parameters

__u16 status_field: The NVMe Completion Queue Entry’s Status Field See enum nvme_status_field

Return

status code type

__u16 nvme_status_code(__u16 status_field)¶: Returns the NVMe Status Code

Parameters

__u16 status_field: The NVMe Completion Queue Entry’s Status Field See enum nvme_status_field

Return

status code

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

Constants

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

Description

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.

__u32 nvme_status_get_type(int status)¶: extract the type from a nvme_* return value

Parameters

int status: the (non-negative) return value from the NVMe API

Return

the type component of the status.

__u32 nvme_status_get_value(int status)¶: extract the status value from a nvme_* return value

Parameters

int status: the (non-negative) return value from the NVMe API

Return

the value component of the status; the set of values will depend on the status type.

__u32 nvme_status_equals(int status, enum nvme_status_type type, unsigned int value)¶: helper to check a status against a type and value

Parameters

int status: the (non-negative) return value from the NVMe API
enum nvme_status_type type: the status type
unsigned int value: the status value

Return

true if status is of the specified type and value

enum nvme_admin_opcode¶: Known NVMe admin opcodes

Constants

nvme_admin_delete_sq: Delete I/O Submission Queue
nvme_admin_create_sq: Create I/O Submission Queue
nvme_admin_get_log_page: Get Log Page
nvme_admin_delete_cq: Delete I/O Completion Queue
nvme_admin_create_cq: Create I/O Completion Queue
nvme_admin_identify: Identify
nvme_admin_abort_cmd: Abort
nvme_admin_set_features: Set Features
nvme_admin_get_features: Get Features
nvme_admin_async_event: Asynchronous Event Request
nvme_admin_ns_mgmt: Namespace Management
nvme_admin_fw_commit: Firmware Commit
nvme_admin_fw_activate: Firmware Commit
nvme_admin_fw_download: Firmware Image Download
nvme_admin_dev_self_test: Device Self-test
nvme_admin_ns_attach: Namespace Attachment
nvme_admin_keep_alive: Keep Alive
nvme_admin_directive_send: Directive Send
nvme_admin_directive_recv: Directive Receive
nvme_admin_virtual_mgmt: Virtualization Management
nvme_admin_nvme_mi_send: NVMe-MI Send
nvme_admin_nvme_mi_recv: NVMe-MI Receive
nvme_admin_capacity_mgmt: Capacity Management
nvme_admin_discovery_info_mgmt: Discovery Information Management (DIM)
nvme_admin_fabric_zoning_recv: Fabric Zoning Receive
nvme_admin_lockdown: Lockdown
nvme_admin_fabric_zoning_lookup: Fabric Zoning Lookup
nvme_admin_fabric_zoning_send: Fabric Zoning Send
nvme_admin_dbbuf: Doorbell Buffer Config
nvme_admin_fabrics: Fabrics Commands
nvme_admin_format_nvm: Format NVM
nvme_admin_security_send: Security Send
nvme_admin_security_recv: Security Receive
nvme_admin_sanitize_nvm: Sanitize
nvme_admin_get_lba_status: Get LBA Status

enum nvme_identify_cns¶: Identify - CNS Values

Constants

NVME_IDENTIFY_CNS_NS: Identify Namespace data structure
NVME_IDENTIFY_CNS_CTRL: Identify Controller data structure
NVME_IDENTIFY_CNS_NS_ACTIVE_LIST: Active Namespace ID list
NVME_IDENTIFY_CNS_NS_DESC_LIST: Namespace Identification Descriptor list
NVME_IDENTIFY_CNS_NVMSET_LIST: NVM Set List
NVME_IDENTIFY_CNS_CSI_NS: I/O Command Set specific Identify Namespace data structure
NVME_IDENTIFY_CNS_CSI_CTRL: I/O Command Set specific Identify Controller data structure
NVME_IDENTIFY_CNS_CSI_NS_ACTIVE_LIST: Active Namespace ID list associated with the specified I/O Command Set
NVME_IDENTIFY_CNS_CSI_INDEPENDENT_ID_NS: I/O Command Set Independent Identify
NVME_IDENTIFY_CNS_NS_USER_DATA_FORMAT: Namespace user data format
NVME_IDENTIFY_CNS_CSI_NS_USER_DATA_FORMAT: I/O Command Set specific user data format Namespace data structure
NVME_IDENTIFY_CNS_ALLOCATED_NS_LIST: Allocated Namespace ID list
NVME_IDENTIFY_CNS_ALLOCATED_NS: Identify Namespace data structure for the specified allocated NSID
NVME_IDENTIFY_CNS_NS_CTRL_LIST: Controller List of controllers attached to the specified NSID
NVME_IDENTIFY_CNS_CTRL_LIST: Controller List of controllers that exist in the NVM subsystem
NVME_IDENTIFY_CNS_PRIMARY_CTRL_CAP: Primary Controller Capabilities data structure for the specified primary controller
NVME_IDENTIFY_CNS_SECONDARY_CTRL_LIST: Secondary Controller list of controllers associated with the primary controller processing the command
NVME_IDENTIFY_CNS_NS_GRANULARITY: A Namespace Granularity List
NVME_IDENTIFY_CNS_UUID_LIST: A UUID List
NVME_IDENTIFY_CNS_DOMAIN_LIST: Domain List
NVME_IDENTIFY_CNS_ENDURANCE_GROUP_ID: Endurance Group List
NVME_IDENTIFY_CNS_CSI_ALLOCATED_NS_LIST: I/O Command Set specific Allocated Namespace ID list
NVME_IDENTIFY_CNS_CSI_ID_NS_DATA_STRUCTURE: I/O Command Set specific ID Namespace Data Structure for Allocated Namespace ID
NVME_IDENTIFY_CNS_COMMAND_SET_STRUCTURE: Base Specification 2.0a section 5.17.2.21

enum nvme_cmd_get_log_lid¶: Get Log Page -Log Page Identifiers

Constants

NVME_LOG_LID_SUPPORTED_LOG_PAGES: Supported Log Pages
NVME_LOG_LID_ERROR: Error Information
NVME_LOG_LID_SMART: SMART / Health Information
NVME_LOG_LID_FW_SLOT: Firmware Slot Information
NVME_LOG_LID_CHANGED_NS: Changed Namespace List
NVME_LOG_LID_CMD_EFFECTS: Commands Supported and Effects
NVME_LOG_LID_DEVICE_SELF_TEST: Device Self-test
NVME_LOG_LID_TELEMETRY_HOST: Telemetry Host-Initiated
NVME_LOG_LID_TELEMETRY_CTRL: Telemetry Controller-Initiated
NVME_LOG_LID_ENDURANCE_GROUP: Endurance Group Information
NVME_LOG_LID_PREDICTABLE_LAT_NVMSET: Predictable Latency Per NVM Set
NVME_LOG_LID_PREDICTABLE_LAT_AGG: Predictable Latency Event Aggregate
NVME_LOG_LID_ANA: Asymmetric Namespace Access
NVME_LOG_LID_PERSISTENT_EVENT: Persistent Event Log
NVME_LOG_LID_LBA_STATUS: LBA Status Information
NVME_LOG_LID_ENDURANCE_GRP_EVT: Endurance Group Event Aggregate
NVME_LOG_LID_MEDIA_UNIT_STATUS: Media Unit Status
NVME_LOG_LID_SUPPORTED_CAP_CONFIG_LIST: Supported Capacity Configuration Lis
NVME_LOG_LID_FID_SUPPORTED_EFFECTS: Feature Identifiers Supported and Effects
NVME_LOG_LID_MI_CMD_SUPPORTED_EFFECTS: NVMe-MI Commands Supported and Effects
NVME_LOG_LID_BOOT_PARTITION: Boot Partition
NVME_LOG_LID_DISCOVER: Discovery
NVME_LOG_LID_RESERVATION: Reservation Notification
NVME_LOG_LID_SANITIZE: Sanitize Status
NVME_LOG_LID_ZNS_CHANGED_ZONES: Changed Zone List

enum nvme_features_id¶: Features - Feature Identifiers

Constants

NVME_FEAT_FID_ARBITRATION: Arbitration
NVME_FEAT_FID_POWER_MGMT: Power Management
NVME_FEAT_FID_LBA_RANGE: LBA Range Type
NVME_FEAT_FID_TEMP_THRESH: Temperature Threshold
NVME_FEAT_FID_ERR_RECOVERY: Error Recovery
NVME_FEAT_FID_VOLATILE_WC: Volatile Write Cache
NVME_FEAT_FID_NUM_QUEUES: Number of Queues
NVME_FEAT_FID_IRQ_COALESCE: Interrupt Coalescing
NVME_FEAT_FID_IRQ_CONFIG: Interrupt Vector Configuration
NVME_FEAT_FID_WRITE_ATOMIC: Write Atomicity Normal
NVME_FEAT_FID_ASYNC_EVENT: Asynchronous Event Configuration
NVME_FEAT_FID_AUTO_PST: Autonomous Power State Transition
NVME_FEAT_FID_HOST_MEM_BUF: Host Memory Buffer
NVME_FEAT_FID_TIMESTAMP: Timestamp
NVME_FEAT_FID_KATO: Keep Alive Timer
NVME_FEAT_FID_HCTM: Host Controlled Thermal Management
NVME_FEAT_FID_NOPSC: Non-Operational Power State Config
NVME_FEAT_FID_RRL: Read Recovery Level Config
NVME_FEAT_FID_PLM_CONFIG: Predictable Latency Mode Config
NVME_FEAT_FID_PLM_WINDOW: Predictable Latency Mode Window
NVME_FEAT_FID_LBA_STS_INTERVAL: LBA Status Information Report Interval
NVME_FEAT_FID_HOST_BEHAVIOR: Host Behavior Support
NVME_FEAT_FID_SANITIZE: Endurance Group Event Configuration
NVME_FEAT_FID_ENDURANCE_EVT_CFG: Endurance Group Event Configuration
NVME_FEAT_FID_IOCS_PROFILE: I/O Command Set Profile
NVME_FEAT_FID_SPINUP_CONTROL: Spinup Control
NVME_FEAT_FID_ENH_CTRL_METADATA: Enhanced Controller Metadata
NVME_FEAT_FID_CTRL_METADATA: Controller Metadata
NVME_FEAT_FID_NS_METADATA: Namespace Metadata
NVME_FEAT_FID_SW_PROGRESS: Software Progress Marker
NVME_FEAT_FID_HOST_ID: Host Identifier
NVME_FEAT_FID_RESV_MASK: Reservation Notification Mask
NVME_FEAT_FID_RESV_PERSIST: Reservation Persistence
NVME_FEAT_FID_WRITE_PROTECT: Namespace Write Protection Config

enum nvme_feat¶: Features Access Shifts/Masks values

Constants

NVME_FEAT_ARBITRATION_BURST_SHIFT

NVME_FEAT_ARBITRATION_BURST_MASK

NVME_FEAT_ARBITRATION_LPW_SHIFT

NVME_FEAT_ARBITRATION_LPW_MASK

NVME_FEAT_ARBITRATION_MPW_SHIFT

NVME_FEAT_ARBITRATION_MPW_MASK

NVME_FEAT_ARBITRATION_HPW_SHIFT

NVME_FEAT_ARBITRATION_HPW_MASK

NVME_FEAT_PWRMGMT_PS_SHIFT

NVME_FEAT_PWRMGMT_PS_MASK

NVME_FEAT_PWRMGMT_WH_SHIFT

NVME_FEAT_PWRMGMT_WH_MASK

NVME_FEAT_LBAR_NR_SHIFT

NVME_FEAT_LBAR_NR_MASK

NVME_FEAT_TT_TMPTH_SHIFT

NVME_FEAT_TT_TMPTH_MASK

NVME_FEAT_TT_TMPSEL_SHIFT

NVME_FEAT_TT_TMPSEL_MASK

NVME_FEAT_TT_THSEL_SHIFT

NVME_FEAT_TT_THSEL_MASK

NVME_FEAT_ERROR_RECOVERY_TLER_SHIFT

NVME_FEAT_ERROR_RECOVERY_TLER_MASK

NVME_FEAT_ERROR_RECOVERY_DULBE_SHIFT

NVME_FEAT_ERROR_RECOVERY_DULBE_MASK

NVME_FEAT_VWC_WCE_SHIFT

NVME_FEAT_VWC_WCE_MASK

NVME_FEAT_NRQS_NSQR_SHIFT

NVME_FEAT_NRQS_NSQR_MASK

NVME_FEAT_NRQS_NCQR_SHIFT

NVME_FEAT_NRQS_NCQR_MASK

NVME_FEAT_IRQC_THR_SHIFT

NVME_FEAT_IRQC_THR_MASK

NVME_FEAT_IRQC_TIME_SHIFT

NVME_FEAT_IRQC_TIME_MASK

NVME_FEAT_ICFG_IV_SHIFT

NVME_FEAT_ICFG_IV_MASK

NVME_FEAT_ICFG_CD_SHIFT

NVME_FEAT_ICFG_CD_MASK

NVME_FEAT_WA_DN_SHIFT

NVME_FEAT_WA_DN_MASK

NVME_FEAT_AE_SMART_SHIFT

NVME_FEAT_AE_SMART_MASK

NVME_FEAT_AE_NAN_SHIFT

NVME_FEAT_AE_NAN_MASK

NVME_FEAT_AE_FW_SHIFT

NVME_FEAT_AE_FW_MASK

NVME_FEAT_AE_TELEM_SHIFT

NVME_FEAT_AE_TELEM_MASK

NVME_FEAT_AE_ANA_SHIFT

NVME_FEAT_AE_ANA_MASK

NVME_FEAT_AE_PLA_SHIFT

NVME_FEAT_AE_PLA_MASK

NVME_FEAT_AE_LBAS_SHIFT

NVME_FEAT_AE_LBAS_MASK

NVME_FEAT_AE_EGA_SHIFT

NVME_FEAT_AE_EGA_MASK

NVME_FEAT_APST_APSTE_SHIFT

NVME_FEAT_APST_APSTE_MASK

NVME_FEAT_HMEM_EHM_SHIFT

NVME_FEAT_HMEM_EHM_MASK

NVME_FEAT_HCTM_TMT2_SHIFT

NVME_FEAT_HCTM_TMT2_MASK

NVME_FEAT_HCTM_TMT1_SHIFT

NVME_FEAT_HCTM_TMT1_MASK

NVME_FEAT_NOPS_NOPPME_SHIFT

NVME_FEAT_NOPS_NOPPME_MASK

NVME_FEAT_RRL_RRL_SHIFT

NVME_FEAT_RRL_RRL_MASK

NVME_FEAT_PLM_PLME_SHIFT

NVME_FEAT_PLM_PLME_MASK

NVME_FEAT_PLMW_WS_SHIFT

NVME_FEAT_PLMW_WS_MASK

NVME_FEAT_LBAS_LSIRI_SHIFT

NVME_FEAT_LBAS_LSIRI_MASK

NVME_FEAT_LBAS_LSIPI_SHIFT

NVME_FEAT_LBAS_LSIPI_MASK

NVME_FEAT_SC_NODRM_SHIFT

NVME_FEAT_SC_NODRM_MASK

NVME_FEAT_EG_ENDGID_SHIFT

NVME_FEAT_EG_ENDGID_MASK

NVME_FEAT_EG_EGCW_SHIFT

NVME_FEAT_EG_EGCW_MASK

NVME_FEAT_SPM_PBSLC_SHIFT

NVME_FEAT_SPM_PBSLC_MASK

NVME_FEAT_HOSTID_EXHID_SHIFT

NVME_FEAT_HOSTID_EXHID_MASK

NVME_FEAT_RM_REGPRE_SHIFT

NVME_FEAT_RM_REGPRE_MASK

NVME_FEAT_RM_RESREL_SHIFT

NVME_FEAT_RM_RESREL_MASK

NVME_FEAT_RM_RESPRE_SHIFT

NVME_FEAT_RM_RESPRE_MASK

NVME_FEAT_RP_PTPL_SHIFT

NVME_FEAT_RP_PTPL_MASK

NVME_FEAT_WP_WPS_SHIFT

NVME_FEAT_WP_WPS_MASK

NVME_FEAT_IOCSP_IOCSCI_SHIFT

NVME_FEAT_IOCSP_IOCSCI_MASK

enum nvme_get_features_sel¶: Get Features - Select

Constants

NVME_GET_FEATURES_SEL_CURRENT: Current value
NVME_GET_FEATURES_SEL_DEFAULT: Default value
NVME_GET_FEATURES_SEL_SAVED: Saved value
NVME_GET_FEATURES_SEL_SUPPORTED: Supported capabilities

enum nvme_cmd_format_mset¶: Format NVM - Metadata Settings

Constants

NVME_FORMAT_MSET_SEPARATE: indicates that the metadata is transferred as part of a separate buffer.
NVME_FORMAT_MSET_EXTENDED: indicates that the metadata is transferred as part of an extended data LBA.

enum nvme_cmd_format_pi¶: Format NVM - Protection Information

Constants

NVME_FORMAT_PI_DISABLE: Protection information is not enabled.
NVME_FORMAT_PI_TYPE1: Protection information is enabled, Type 1.
NVME_FORMAT_PI_TYPE2: Protection information is enabled, Type 2.
NVME_FORMAT_PI_TYPE3: Protection information is enabled, Type 3.

enum nvme_cmd_format_pil¶: Format NVM - Protection Information Location

Constants

NVME_FORMAT_PIL_LAST: Protection information is transferred as the last bytes of metadata.
NVME_FORMAT_PIL_FIRST: Protection information is transferred as the first bytes of metadata.

enum nvme_cmd_format_ses¶: Format NVM - Secure Erase Settings

Constants

NVME_FORMAT_SES_NONE: No secure erase operation requested.
NVME_FORMAT_SES_USER_DATA_ERASE: User Data Erase: All user data shall be erased, contents of the user data after the erase is indeterminate (e.g. the user data may be zero filled, one filled, etc.). If a User Data Erase is requested and all affected user data is encrypted, then the controller is allowed to use a cryptographic erase to perform the requested User Data Erase.
NVME_FORMAT_SES_CRYPTO_ERASE: Cryptographic Erase: All user data shall be erased cryptographically. This is accomplished by deleting the encryption key.

enum nvme_ns_mgmt_sel¶: Namespace Management - Select

Constants

NVME_NS_MGMT_SEL_CREATE: Namespace Create selection
NVME_NS_MGMT_SEL_DELETE: Namespace Delete selection

enum nvme_ns_attach_sel¶: Namespace Attachment - Select

Constants

NVME_NS_ATTACH_SEL_CTRL_ATTACH: Namespace attach selection
NVME_NS_ATTACH_SEL_CTRL_DEATTACH: Namespace detach selection

enum nvme_fw_commit_ca¶: Firmware Commit - Commit Action

Constants

NVME_FW_COMMIT_CA_REPLACE: Downloaded image replaces the existing image, if any, in the specified Firmware Slot. The newly placed image is not activated.
NVME_FW_COMMIT_CA_REPLACE_AND_ACTIVATE: Downloaded image replaces the existing image, if any, in the specified Firmware Slot. The newly placed image is activated at the next Controller Level Reset.
NVME_FW_COMMIT_CA_SET_ACTIVE: The existing image in the specified Firmware Slot is activated at the next Controller Level Reset.
NVME_FW_COMMIT_CA_REPLACE_AND_ACTIVATE_IMMEDIATE: Downloaded image replaces the existing image, if any, in the specified Firmware Slot and is then activated immediately. If there is not a newly downloaded image, then the existing image in the specified firmware slot is activated immediately.
NVME_FW_COMMIT_CA_REPLACE_BOOT_PARTITION: Downloaded image replaces the Boot Partition specified by the Boot Partition ID field.
NVME_FW_COMMIT_CA_ACTIVATE_BOOT_PARTITION: Mark the Boot Partition specified in the BPID field as active and update BPINFO.ABPID.

enum nvme_directive_dtype¶: Directive Types

Constants

NVME_DIRECTIVE_DTYPE_IDENTIFY: Identify directive type
NVME_DIRECTIVE_DTYPE_STREAMS: Streams directive type

enum nvme_directive_receive_doper¶: Directive Receive Directive Operation

Constants

NVME_DIRECTIVE_RECEIVE_IDENTIFY_DOPER_PARAM

NVME_DIRECTIVE_RECEIVE_STREAMS_DOPER_PARAM

NVME_DIRECTIVE_RECEIVE_STREAMS_DOPER_STATUS

NVME_DIRECTIVE_RECEIVE_STREAMS_DOPER_RESOURCE

enum nvme_directive_send_doper¶: Directive Send Directive Operation

Constants

NVME_DIRECTIVE_SEND_IDENTIFY_DOPER_ENDIR

NVME_DIRECTIVE_SEND_STREAMS_DOPER_RELEASE_IDENTIFIER

NVME_DIRECTIVE_SEND_STREAMS_DOPER_RELEASE_RESOURCE

enum nvme_directive_send_identify_endir¶: Enable Directive

Constants

NVME_DIRECTIVE_SEND_IDENTIFY_ENDIR_DISABLE

NVME_DIRECTIVE_SEND_IDENTIFY_ENDIR_ENABLE

enum nvme_sanitize_sanact¶: Sanitize Action

Constants

NVME_SANITIZE_SANACT_EXIT_FAILURE: Exit Failure Mode.
NVME_SANITIZE_SANACT_START_BLOCK_ERASE: Start a Block Erase sanitize operation.
NVME_SANITIZE_SANACT_START_OVERWRITE: Start an Overwrite sanitize operation.
NVME_SANITIZE_SANACT_START_CRYPTO_ERASE: Start a Crypto Erase sanitize operation.

enum nvme_dst_stc¶: Action taken by the Device Self-test command

Constants

NVME_DST_STC_SHORT: Start a short device self-test operation
NVME_DST_STC_LONG: Start an extended device self-test operation
NVME_DST_STC_VS: Start a vendor specific device self-test operation
NVME_DST_STC_ABORT: Abort device self-test operation

enum nvme_virt_mgmt_act¶: Virtualization Management - Action

Constants

NVME_VIRT_MGMT_ACT_PRIM_CTRL_FLEX_ALLOC: Primary Controller Flexible Allocation
NVME_VIRT_MGMT_ACT_OFFLINE_SEC_CTRL: Secondary Controller Offline
NVME_VIRT_MGMT_ACT_ASSIGN_SEC_CTRL: Secondary Controller Assign
NVME_VIRT_MGMT_ACT_ONLINE_SEC_CTRL: Secondary Controller Online

enum nvme_virt_mgmt_rt¶: Virtualization Management - Resource Type

Constants

NVME_VIRT_MGMT_RT_VQ_RESOURCE: VQ Resources
NVME_VIRT_MGMT_RT_VI_RESOURCE: VI Resources

enum nvme_ns_write_protect_cfg¶: Write Protection - Write Protection State

Constants

NVME_NS_WP_CFG_NONE: No Write Protect
NVME_NS_WP_CFG_PROTECT: Write Protect
NVME_NS_WP_CFG_PROTECT_POWER_CYCLE: Write Protect Until Power Cycle
NVME_NS_WP_CFG_PROTECT_PERMANENT: Permanent Write Protect

enum nvme_log_ana_lsp¶: Asymmetric Namespace Access - Return Groups Only

Constants

NVME_LOG_ANA_LSP_RGO_NAMESPACES

NVME_LOG_ANA_LSP_RGO_GROUPS_ONLY

enum nvme_pevent_log_action¶: Persistent Event Log - Action

Constants

NVME_PEVENT_LOG_READ: Read Log Data
NVME_PEVENT_LOG_EST_CTX_AND_READ: Establish Context and Read Log Data
NVME_PEVENT_LOG_RELEASE_CTX: Release Context

enum nvme_feat_tmpthresh_thsel¶: Temperature Threshold - Threshold Type Select

Constants

NVME_FEATURE_TEMPTHRESH_THSEL_OVER: Over temperature threshold select
NVME_FEATURE_TEMPTHRESH_THSEL_UNDER: Under temperature threshold select

enum nvme_features_async_event_config_flags¶: Asynchronous Event Configuration configuration flags

Constants

NVME_FEATURE_AENCFG_SMART_CRIT_SPARE

NVME_FEATURE_AENCFG_SMART_CRIT_TEMPERATURE

NVME_FEATURE_AENCFG_SMART_CRIT_DEGRADED

NVME_FEATURE_AENCFG_SMART_CRIT_READ_ONLY

NVME_FEATURE_AENCFG_SMART_CRIT_VOLATILE_BACKUP

NVME_FEATURE_AENCFG_SMART_CRIT_READ_ONLY_PMR

NVME_FEATURE_AENCFG_NOTICE_NAMESPACE_ATTRIBUTES

NVME_FEATURE_AENCFG_NOTICE_FIRMWARE_ACTIVATION

NVME_FEATURE_AENCFG_NOTICE_TELEMETRY_LOG

NVME_FEATURE_AENCFG_NOTICE_ANA_CHANGE

NVME_FEATURE_AENCFG_NOTICE_PL_EVENT

NVME_FEATURE_AENCFG_NOTICE_LBA_STATUS

NVME_FEATURE_AENCFG_NOTICE_EG_EVENT

NVME_FEATURE_AENCFG_NOTICE_DISCOVERY_CHANGE

enum nvme_feat_plm_window_select¶: Predictable Latency Per NVM Set Log

Constants

NVME_FEATURE_PLM_DTWIN: Deterministic Window select
NVME_FEATURE_PLM_NDWIN: Non-Deterministic Window select

enum nvme_feat_resv_notify_flags¶: Reservation Notification Configuration

Constants

NVME_FEAT_RESV_NOTIFY_REGPRE: Mask Registration Preempted Notification
NVME_FEAT_RESV_NOTIFY_RESREL: Mask Reservation Released Notification
NVME_FEAT_RESV_NOTIFY_RESPRE: Mask Reservation Preempted Notification

enum nvme_feat_nswpcfg_state¶: Write Protection - Write Protection State

Constants

NVME_FEAT_NS_NO_WRITE_PROTECT: No Write Protect
NVME_FEAT_NS_WRITE_PROTECT: Write Protect
NVME_FEAT_NS_WRITE_PROTECT_PWR_CYCLE: Write Protect Until Power Cycle
NVME_FEAT_NS_WRITE_PROTECT_PERMANENT: Permanent Write Protect

enum nvme_fctype¶: Fabrics Command Types

Constants

nvme_fabrics_type_property_set: Property set
nvme_fabrics_type_connect: Connect
nvme_fabrics_type_property_get: Property Get
nvme_fabrics_type_auth_send: Authentication Send
nvme_fabrics_type_auth_receive: Authentication Receive
nvme_fabrics_type_disconnect: Disconnect

enum nvme_data_tfr¶: Data transfer direction of the command

Constants

NVME_DATA_TFR_NO_DATA_TFR: No data transfer
NVME_DATA_TFR_HOST_TO_CTRL: Host to controller
NVME_DATA_TFR_CTRL_TO_HOST: Controller to host
NVME_DATA_TFR_BIDIRECTIONAL: Bidirectional

enum nvme_io_opcode¶: Opcodes for I/O Commands

Constants

nvme_cmd_flush: Flush
nvme_cmd_write: Write
nvme_cmd_read: Read
nvme_cmd_write_uncor: Write Uncorrectable
nvme_cmd_compare: Compare
nvme_cmd_write_zeroes: write Zeros
nvme_cmd_dsm: Dataset Management
nvme_cmd_verify: Verify
nvme_cmd_resv_register: Reservation Register
nvme_cmd_resv_report: Reservation Report
nvme_cmd_resv_acquire: Reservation Acquire
nvme_cmd_resv_release: Reservation Release
nvme_cmd_copy: Copy
nvme_zns_cmd_mgmt_send: Zone Management Send
nvme_zns_cmd_mgmt_recv: Zone Management Receive
nvme_zns_cmd_append: Zone Append

enum nvme_io_control_flags¶: I/O control flags

Constants

NVME_IO_DTYPE_STREAMS: Directive Type Streams
NVME_IO_STC: Storage Tag Check
NVME_IO_DEAC: Deallocate
NVME_IO_ZNS_APPEND_PIREMAP: Protection Information Remap
NVME_IO_PRINFO_PRCHK_REF: Protection Information Check Reference Tag
NVME_IO_PRINFO_PRCHK_APP: Protection Information Check Application Tag
NVME_IO_PRINFO_PRCHK_GUARD: Protection Information Check Guard field
NVME_IO_PRINFO_PRACT: Protection Information Action
NVME_IO_FUA: Force Unit Access
NVME_IO_LR: Limited Retry

enum nvme_io_dsm_flags¶: Dataset Management flags

Constants

NVME_IO_DSM_FREQ_UNSPEC: No frequency information provided
NVME_IO_DSM_FREQ_TYPICAL: Typical number of reads and writes expected for this LBA range
NVME_IO_DSM_FREQ_RARE: Infrequent writes and infrequent reads to the LBA range indicated
NVME_IO_DSM_FREQ_READS: Infrequent writes and frequent reads to the LBA range indicated
NVME_IO_DSM_FREQ_WRITES: Frequent writes and infrequent reads to the LBA range indicated
NVME_IO_DSM_FREQ_RW: Frequent writes and frequent reads to the LBA range indicated

NVME_IO_DSM_FREQ_ONCE

NVME_IO_DSM_FREQ_PREFETCH

NVME_IO_DSM_FREQ_TEMP

NVME_IO_DSM_LATENCY_NONE: No latency information provided
NVME_IO_DSM_LATENCY_IDLE: Longer latency acceptable
NVME_IO_DSM_LATENCY_NORM: Typical latency
NVME_IO_DSM_LATENCY_LOW: Smallest possible latency

NVME_IO_DSM_SEQ_REQ

NVME_IO_DSM_COMPRESSED

enum nvme_dsm_attributes¶: Dataset Management attributes

Constants

NVME_DSMGMT_IDR: Attribute -Integral Dataset for Read
NVME_DSMGMT_IDW: Attribute - Integral Dataset for Write
NVME_DSMGMT_AD: Attribute - Deallocate

enum nvme_resv_rtype¶: Reservation Type Encoding

Constants

NVME_RESERVATION_RTYPE_WE: Write Exclusive Reservation
NVME_RESERVATION_RTYPE_EA: Exclusive Access Reservation
NVME_RESERVATION_RTYPE_WERO: Write Exclusive - Registrants Only Reservation
NVME_RESERVATION_RTYPE_EARO: Exclusive Access - Registrants Only Reservation
NVME_RESERVATION_RTYPE_WEAR: Write Exclusive - All Registrants Reservation
NVME_RESERVATION_RTYPE_EAAR: Exclusive Access - All Registrants Reservation

enum nvme_resv_racqa¶: Reservation Acquire - Reservation Acquire Action

Constants

NVME_RESERVATION_RACQA_ACQUIRE: Acquire
NVME_RESERVATION_RACQA_PREEMPT: Preempt
NVME_RESERVATION_RACQA_PREEMPT_AND_ABORT: Preempt and Abort

enum nvme_resv_rrega¶: Reservation Register - Reservation Register Action

Constants

NVME_RESERVATION_RREGA_REGISTER_KEY: Register Reservation Key
NVME_RESERVATION_RREGA_UNREGISTER_KEY: Unregister Reservation Key
NVME_RESERVATION_RREGA_REPLACE_KEY: Replace Reservation Key

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

Constants

NVME_RESERVATION_CPTPL_NO_CHANGE: No change to PTPL state
NVME_RESERVATION_CPTPL_CLEAR: Reservations are released and registrants are cleared on a power on
NVME_RESERVATION_CPTPL_PERSIST: Reservations and registrants persist across a power loss

enum nvme_resv_rrela¶: Reservation Release - Reservation Release Action

Constants

NVME_RESERVATION_RRELA_RELEASE: Release
NVME_RESERVATION_RRELA_CLEAR: Clear

enum nvme_zns_send_action¶: Zone Management Send - Zone Send Action

Constants

NVME_ZNS_ZSA_CLOSE: Close Zone
NVME_ZNS_ZSA_FINISH: Finish Zone
NVME_ZNS_ZSA_OPEN: Open Zone
NVME_ZNS_ZSA_RESET: Reset Zone
NVME_ZNS_ZSA_OFFLINE: Offline Zone
NVME_ZNS_ZSA_SET_DESC_EXT: Set Zone Descriptor Extension
NVME_ZNS_ZSA_ZRWA_FLUSH: Flush

enum nvme_zns_recv_action¶: Zone Management Receive - Zone Receive Action Specific Features

Constants

NVME_ZNS_ZRA_REPORT_ZONES: Report Zones
NVME_ZNS_ZRA_EXTENDED_REPORT_ZONES: Extended Report Zones

enum nvme_zns_report_options¶: Zone Management Receive - Zone Receive Action Specific Field

Constants

NVME_ZNS_ZRAS_REPORT_ALL: List all zones
NVME_ZNS_ZRAS_REPORT_EMPTY: List the zones in the ZSE:Empty state
NVME_ZNS_ZRAS_REPORT_IMPL_OPENED: List the zones in the ZSIO:Implicitly Opened state
NVME_ZNS_ZRAS_REPORT_EXPL_OPENED: List the zones in the ZSEO:Explicitly Opened state
NVME_ZNS_ZRAS_REPORT_CLOSED: List the zones in the ZSC:Closed state
NVME_ZNS_ZRAS_REPORT_FULL: List the zones in the ZSF:Full state
NVME_ZNS_ZRAS_REPORT_READ_ONLY: List the zones in the ZSRO:Read Only state
NVME_ZNS_ZRAS_REPORT_OFFLINE: List the zones in the ZSO:Offline state

ioctl.h

Linux NVMe ioctl interface functions

struct nvme_passthru_cmd¶: nvme passthrough command structure

Definition

struct nvme_passthru_cmd {
  __u8 opcode;
  __u8 flags;
  __u16 rsvd1;
  __u32 nsid;
  __u32 cdw2;
  __u32 cdw3;
  __u64 metadata;
  __u64 addr;
  __u32 metadata_len;
  __u32 data_len;
  __u32 cdw10;
  __u32 cdw11;
  __u32 cdw12;
  __u32 cdw13;
  __u32 cdw14;
  __u32 cdw15;
  __u32 timeout_ms;
  __u32 result;
};

Members

opcode: Operation code, see enum nvme_io_opcodes and enum nvme_admin_opcodes
flags: Not supported: intended for command flags (eg: SGL, FUSE)
rsvd1: Reserved for future use
nsid: Namespace Identifier, or Fabrics type
cdw2: Command Dword 2 (no spec defined use)
cdw3: Command Dword 3 (no spec defined use)
metadata: User space address to metadata buffer (NULL if not used)
addr: User space address to data buffer (NULL if not used)
metadata_len: Metadata buffer transfer length
data_len: Data buffer transfer length
cdw10: Command Dword 10 (command specific)
cdw11: Command Dword 11 (command specific)
cdw12: Command Dword 12 (command specific)
cdw13: Command Dword 13 (command specific)
cdw14: Command Dword 14 (command specific)
cdw15: Command Dword 15 (command specific)
timeout_ms: If non-zero, overrides system default timeout in milliseconds
result: Set on completion to the command’s CQE DWORD 0 controller response

struct nvme_passthru_cmd64¶: 64-bit nvme passthrough command structure

Definition

struct nvme_passthru_cmd64 {
  __u8 opcode;
  __u8 flags;
  __u16 rsvd1;
  __u32 nsid;
  __u32 cdw2;
  __u32 cdw3;
  __u64 metadata;
  __u64 addr;
  __u32 metadata_len;
  __u32 data_len;
  __u32 cdw10;
  __u32 cdw11;
  __u32 cdw12;
  __u32 cdw13;
  __u32 cdw14;
  __u32 cdw15;
  __u32 timeout_ms;
  __u32 rsvd2;
  __u64 result;
};

Members

opcode: Operation code, see enum nvme_io_opcodes and enum nvme_admin_opcodes
flags: Not supported: intended for command flags (eg: SGL, FUSE)
rsvd1: Reserved for future use
nsid: Namespace Identifier, or Fabrics type
cdw2: Command Dword 2 (no spec defined use)
cdw3: Command Dword 3 (no spec defined use)
metadata: User space address to metadata buffer (NULL if not used)
addr: User space address to data buffer (NULL if not used)
metadata_len: Metadata buffer transfer length
data_len: Data buffer transfer length
cdw10: Command Dword 10 (command specific)
cdw11: Command Dword 11 (command specific)
cdw12: Command Dword 12 (command specific)
cdw13: Command Dword 13 (command specific)
cdw14: Command Dword 14 (command specific)
cdw15: Command Dword 15 (command specific)
timeout_ms: If non-zero, overrides system default timeout in milliseconds
rsvd2: Reserved for future use (and fills an implicit struct pad
result: Set on completion to the command’s CQE DWORD 0-1 controller response

struct nvme_uring_cmd¶: nvme uring command structure

Definition

struct nvme_uring_cmd {
  __u8 opcode;
  __u8 flags;
  __u16 rsvd1;
  __u32 nsid;
  __u32 cdw2;
  __u32 cdw3;
  __u64 metadata;
  __u64 addr;
  __u32 metadata_len;
  __u32 data_len;
  __u32 cdw10;
  __u32 cdw11;
  __u32 cdw12;
  __u32 cdw13;
  __u32 cdw14;
  __u32 cdw15;
  __u32 timeout_ms;
  __u32 rsvd2;
};

Members

opcode: Operation code, see enum nvme_io_opcodes and enum nvme_admin_opcodes
flags: Not supported: intended for command flags (eg: SGL, FUSE)
rsvd1: Reserved for future use
nsid: Namespace Identifier, or Fabrics type
cdw2: Command Dword 2 (no spec defined use)
cdw3: Command Dword 3 (no spec defined use)
metadata: User space address to metadata buffer (NULL if not used)
addr: User space address to data buffer (NULL if not used)
metadata_len: Metadata buffer transfer length
data_len: Data buffer transfer length
cdw10: Command Dword 10 (command specific)
cdw11: Command Dword 11 (command specific)
cdw12: Command Dword 12 (command specific)
cdw13: Command Dword 13 (command specific)
cdw14: Command Dword 14 (command specific)
cdw15: Command Dword 15 (command specific)
timeout_ms: If non-zero, overrides system default timeout in milliseconds
rsvd2: Reserved for future use (and fills an implicit struct pad

sizeof_args¶

sizeof_args (type, member, align)

Helper function used to determine structure sizes

Parameters

type: Argument structure type
member: Member inside the type
align: Alignment information

int nvme_submit_admin_passthru64(int fd, struct nvme_passthru_cmd64 *cmd, __u64 *result)¶: Submit a 64-bit nvme passthrough admin command

Parameters

int fd: File descriptor of nvme device
struct nvme_passthru_cmd64 *cmd: The nvme admin command to send
__u64 *result: Optional field to return the result from the CQE DW0-1

Description

Uses NVME_IOCTL_ADMIN64_CMD for the ioctl request.

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_admin_passthru64(int fd, __u8 opcode, __u8 flags, __u16 rsvd, __u32 nsid, __u32 cdw2, __u32 cdw3, __u32 cdw10, __u32 cdw11, __u32 cdw12, __u32 cdw13, __u32 cdw14, __u32 cdw15, __u32 data_len, void *data, __u32 metadata_len, void *metadata, __u32 timeout_ms, __u64 *result)¶: Submit a 64-bit nvme passthrough command

Parameters

int fd: File descriptor of nvme device
__u8 opcode: The nvme io command to send
__u8 flags: NVMe command flags (not used)
__u16 rsvd: Reserved for future use
__u32 nsid: Namespace identifier
__u32 cdw2: Command dword 2
__u32 cdw3: Command dword 3
__u32 cdw10: Command dword 10
__u32 cdw11: Command dword 11
__u32 cdw12: Command dword 12
__u32 cdw13: Command dword 13
__u32 cdw14: Command dword 14
__u32 cdw15: Command dword 15
__u32 data_len: Length of the data transferred in this command in bytes
void *data: Pointer to user address of the data buffer
__u32 metadata_len: Length of metadata transferred in this command
void *metadata: Pointer to user address of the metadata buffer
__u32 timeout_ms: How long the kernel waits for the command to complete
__u64 *result: Optional field to return the result from the CQE dword 0

Description

Parameterized form of nvme_submit_admin_passthru64(). This sets up and submits a struct nvme_passthru_cmd64.

Known values for opcode are defined in enum nvme_admin_opcode.

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_submit_admin_passthru(int fd, struct nvme_passthru_cmd *cmd, __u32 *result)¶: Submit an nvme passthrough admin command

Parameters

int fd: File descriptor of nvme device
struct nvme_passthru_cmd *cmd: The nvme admin command to send
__u32 *result: Optional field to return the result from the CQE DW0

Description

Uses NVME_IOCTL_ADMIN_CMD for the ioctl request.

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_admin_passthru(int fd, __u8 opcode, __u8 flags, __u16 rsvd, __u32 nsid, __u32 cdw2, __u32 cdw3, __u32 cdw10, __u32 cdw11, __u32 cdw12, __u32 cdw13, __u32 cdw14, __u32 cdw15, __u32 data_len, void *data, __u32 metadata_len, void *metadata, __u32 timeout_ms, __u32 *result)¶: Submit an nvme passthrough command

Parameters

int fd: File descriptor of nvme device
__u8 opcode: The nvme io command to send
__u8 flags: NVMe command flags (not used)
__u16 rsvd: Reserved for future use
__u32 nsid: Namespace identifier
__u32 cdw2: Command dword 2
__u32 cdw3: Command dword 3
__u32 cdw10: Command dword 10
__u32 cdw11: Command dword 11
__u32 cdw12: Command dword 12
__u32 cdw13: Command dword 13
__u32 cdw14: Command dword 14
__u32 cdw15: Command dword 15
__u32 data_len: Length of the data transferred in this command in bytes
void *data: Pointer to user address of the data buffer
__u32 metadata_len: Length of metadata transferred in this command
void *metadata: Pointer to user address of the metadata buffer
__u32 timeout_ms: How long the kernel waits for the command to complete
__u32 *result: Optional field to return the result from the CQE dword 0

Description

Parameterized form of nvme_submit_admin_passthru(). This sets up and submits a struct nvme_passthru_cmd.

Known values for opcode are defined in enum nvme_admin_opcode.

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_submit_io_passthru64(int fd, struct nvme_passthru_cmd64 *cmd, __u64 *result)¶: Submit a 64-bit nvme passthrough command

Parameters

int fd: File descriptor of nvme device
struct nvme_passthru_cmd64 *cmd: The nvme io command to send
__u64 *result: Optional field to return the result from the CQE DW0-1

Description

Uses NVME_IOCTL_IO64_CMD for the ioctl request.

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_io_passthru64(int fd, __u8 opcode, __u8 flags, __u16 rsvd, __u32 nsid, __u32 cdw2, __u32 cdw3, __u32 cdw10, __u32 cdw11, __u32 cdw12, __u32 cdw13, __u32 cdw14, __u32 cdw15, __u32 data_len, void *data, __u32 metadata_len, void *metadata, __u32 timeout_ms, __u64 *result)¶: Submit an nvme io passthrough command

Parameters

int fd: File descriptor of nvme device
__u8 opcode: The nvme io command to send
__u8 flags: NVMe command flags (not used)
__u16 rsvd: Reserved for future use
__u32 nsid: Namespace identifier
__u32 cdw2: Command dword 2
__u32 cdw3: Command dword 3
__u32 cdw10: Command dword 10
__u32 cdw11: Command dword 11
__u32 cdw12: Command dword 12
__u32 cdw13: Command dword 13
__u32 cdw14: Command dword 14
__u32 cdw15: Command dword 15
__u32 data_len: Length of the data transferred in this command in bytes
void *data: Pointer to user address of the data buffer
__u32 metadata_len: Length of metadata transferred in this command
void *metadata: Pointer to user address of the metadata buffer
__u32 timeout_ms: How long the kernel waits for the command to complete
__u64 *result: Optional field to return the result from the CQE dword 0

Description

Parameterized form of nvme_submit_io_passthru64(). This sets up and submits a struct nvme_passthru_cmd64.

Known values for opcode are defined in enum nvme_io_opcode.

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_submit_io_passthru(int fd, struct nvme_passthru_cmd *cmd, __u32 *result)¶: Submit an nvme passthrough command

Parameters

int fd: File descriptor of nvme device
struct nvme_passthru_cmd *cmd: The nvme io command to send
__u32 *result: Optional field to return the result from the CQE DW0

Description

Uses NVME_IOCTL_IO_CMD for the ioctl request.

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_io_passthru(int fd, __u8 opcode, __u8 flags, __u16 rsvd, __u32 nsid, __u32 cdw2, __u32 cdw3, __u32 cdw10, __u32 cdw11, __u32 cdw12, __u32 cdw13, __u32 cdw14, __u32 cdw15, __u32 data_len, void *data, __u32 metadata_len, void *metadata, __u32 timeout_ms, __u32 *result)¶: Submit an nvme io passthrough command

Parameters

int fd: File descriptor of nvme device
__u8 opcode: The nvme io command to send
__u8 flags: NVMe command flags (not used)
__u16 rsvd: Reserved for future use
__u32 nsid: Namespace identifier
__u32 cdw2: Command dword 2
__u32 cdw3: Command dword 3
__u32 cdw10: Command dword 10
__u32 cdw11: Command dword 11
__u32 cdw12: Command dword 12
__u32 cdw13: Command dword 13
__u32 cdw14: Command dword 14
__u32 cdw15: Command dword 15
__u32 data_len: Length of the data transferred in this command in bytes
void *data: Pointer to user address of the data buffer
__u32 metadata_len: Length of metadata transferred in this command
void *metadata: Pointer to user address of the metadata buffer
__u32 timeout_ms: How long the kernel waits for the command to complete
__u32 *result: Optional field to return the result from the CQE dword 0

Description

Parameterized form of nvme_submit_io_passthru(). This sets up and submits a struct nvme_passthru_cmd.

Known values for opcode are defined in enum nvme_io_opcode.

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_subsystem_reset(int fd)¶: Initiate a subsystem reset

Parameters

int fd: File descriptor of nvme device

Description

This should only be sent to controller handles, not to namespaces.

Return

Zero if a subsystem reset was initiated or -1 with errno set otherwise.

int nvme_ctrl_reset(int fd)¶: Initiate a controller reset

Parameters

int fd: File descriptor of nvme device

Description

This should only be sent to controller handles, not to namespaces.

Return

0 if a reset was initiated or -1 with errno set otherwise.

int nvme_ns_rescan(int fd)¶: Initiate a controller rescan

Parameters

int fd: File descriptor of nvme device

Description

This should only be sent to controller handles, not to namespaces.

Return

0 if a rescan was initiated or -1 with errno set otherwise.

int nvme_get_nsid(int fd, __u32 *nsid)¶: Retrieve the NSID from a namespace file descriptor

Parameters

int fd: File descriptor of nvme namespace
__u32 *nsid: User pointer to namespace id

Description

This should only be sent to namespace handles, not to controllers. The kernel’s interface returns the nsid as the return value. This is unfortunate for many architectures that are incapable of allowing distinguishing a namespace id > 0x80000000 from a negative error number.

Return

0 if nsid was set successfully or -1 with errno set otherwise.

int nvme_identify(struct nvme_identify_args *args)¶: Send the NVMe Identify command

Parameters

struct nvme_identify_args *args: struct nvme_identify_args argument structure

Description

The Identify command returns a data buffer that describes information about the NVM subsystem, the controller or the namespace(s).

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_identify_ctrl(int fd, struct nvme_id_ctrl *id)¶: Retrieves nvme identify controller

Parameters

int fd: File descriptor of nvme device
struct nvme_id_ctrl *id: User space destination address to transfer the data,

Description

Sends nvme identify with CNS value NVME_IDENTIFY_CNS_CTRL.

See struct nvme_id_ctrl for details on the data returned.

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_identify_ns(int fd, __u32 nsid, struct nvme_id_ns *ns)¶: Retrieves nvme identify namespace

Parameters

int fd: File descriptor of nvme device
__u32 nsid: Namespace to identify
struct nvme_id_ns *ns: User space destination address to transfer the data

Description

If the Namespace Identifier (NSID) field specifies an active NSID, then the Identify Namespace data structure is returned to the host for that specified namespace.

If the controller supports the Namespace Management capability and the NSID field is set to NVME_NSID_ALL, then the controller returns an Identify Namespace data structure that specifies capabilities that are common across namespaces for this controller.

See struct nvme_id_ns for details on the structure returned.

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_identify_allocated_ns(int fd, __u32 nsid, struct nvme_id_ns *ns)¶: Same as nvme_identify_ns, but only for allocated namespaces

Parameters

int fd: File descriptor of nvme device
__u32 nsid: Namespace to identify
struct nvme_id_ns *ns: User space destination address to transfer the data

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_identify_active_ns_list(int fd, __u32 nsid, struct nvme_ns_list *list)¶: Retrieves active namespaces id list

Parameters

int fd: File descriptor of nvme device
__u32 nsid: Return namespaces greater than this identifier
struct nvme_ns_list *list: User space destination address to transfer the data

Description

A list of 1024 namespace IDs is returned to the host containing NSIDs in increasing order that are greater than the value specified in the Namespace Identifier (nsid) field of the command.

See struct nvme_ns_list for the definition of the returned structure.

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_identify_allocated_ns_list(int fd, __u32 nsid, struct nvme_ns_list *list)¶: Retrieves allocated namespace id list

Parameters

int fd: File descriptor of nvme device
__u32 nsid: Return namespaces greater than this identifier
struct nvme_ns_list *list: User space destination address to transfer the data

Description

A list of 1024 namespace IDs is returned to the host containing NSIDs in increasing order that are greater than the value specified in the Namespace Identifier (nsid) field of the command.

See struct nvme_ns_list for the definition of the returned structure.

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_identify_ctrl_list(int fd, __u16 cntid, struct nvme_ctrl_list *cntlist)¶: Retrieves identify controller list

Parameters

int fd: File descriptor of nvme device
__u16 cntid: Starting CNTLID to return in the list
struct nvme_ctrl_list *cntlist: User space destination address to transfer the data

Description

Up to 2047 controller identifiers is returned containing a controller identifier greater than or equal to the controller identifier specified in cntid.

See struct nvme_ctrl_list for a definition of the structure returned.

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_identify_nsid_ctrl_list(int fd, __u32 nsid, __u16 cntid, struct nvme_ctrl_list *cntlist)¶: Retrieves controller list attached to an nsid

Parameters

int fd: File descriptor of nvme device
__u32 nsid: Return controllers that are attached to this nsid
__u16 cntid: Starting CNTLID to return in the list
struct nvme_ctrl_list *cntlist: User space destination address to transfer the data

Description

Up to 2047 controller identifiers are returned containing a controller identifier greater than or equal to the controller identifier specified in cntid attached to nsid.

See struct nvme_ctrl_list for a definition of the structure returned.

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1

int nvme_identify_ns_descs(int fd, __u32 nsid, struct nvme_ns_id_desc *descs)¶: Retrieves namespace descriptor list

Parameters

int fd: File descriptor of nvme device
__u32 nsid: The namespace id to retrieve descriptors
struct nvme_ns_id_desc *descs: User space destination address to transfer the data

Description

A list of Namespace Identification Descriptor structures is returned to the host for the namespace specified in the Namespace Identifier (NSID) field if it is an active NSID.

The data returned is in the form of an array of ‘struct nvme_ns_id_desc’.

See struct nvme_ns_id_desc for the definition of the returned structure.

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_identify_nvmset_list(int fd, __u16 nvmsetid, struct nvme_id_nvmset_list *nvmset)¶: Retrieves NVM Set List

Parameters

int fd: File descriptor of nvme device
__u16 nvmsetid: NVM Set Identifier
struct nvme_id_nvmset_list *nvmset: User space destination address to transfer the data

Description

Retrieves an NVM Set List, struct nvme_id_nvmset_list. The data structure is an ordered list by NVM Set Identifier, starting with the first NVM Set Identifier supported by the NVM subsystem that is equal to or greater than the NVM Set Identifier.

See struct nvme_id_nvmset_list for the definition of the returned structure.

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_identify_primary_ctrl(int fd, __u16 cntid, struct nvme_primary_ctrl_cap *cap)¶: Retrieve NVMe Primary Controller identification

Parameters

int fd: File descriptor of nvme device
__u16 cntid: Return controllers starting at this identifier
struct nvme_primary_ctrl_cap *cap: User space destination buffer address to transfer the data

Description

See struct nvme_primary_ctrl_cap for the definition of the returned structure, cap.

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_identify_secondary_ctrl_list(int fd, __u32 nsid, __u16 cntid, struct nvme_secondary_ctrl_list *sc_list)¶: Retrieves secondary controller list

Parameters

int fd: File descriptor of nvme device
__u32 nsid: Namespace identifier
__u16 cntid: Return controllers starting at this identifier
struct nvme_secondary_ctrl_list *sc_list: User space destination address to transfer the data

Description

A Secondary Controller List is returned to the host for up to 127 secondary controllers associated with the primary controller processing this command. The list contains entries for controller identifiers greater than or equal to the value specified in the Controller Identifier (cntid).

See struct nvme_secondary_ctrls_list for a definition of the returned structure.

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_identify_ns_granularity(int fd, struct nvme_id_ns_granularity_list *gr_list)¶: Retrieves namespace granularity identification

Parameters

int fd: File descriptor of nvme device
struct nvme_id_ns_granularity_list *gr_list: User space destination address to transfer the data

Description

If the controller supports reporting of Namespace Granularity, then a Namespace Granularity List is returned to the host for up to sixteen namespace granularity descriptors

See struct nvme_id_ns_granularity_list for the definition of the returned structure.

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_identify_uuid(int fd, struct nvme_id_uuid_list *uuid_list)¶: Retrieves device’s UUIDs

Parameters

int fd: File descriptor of nvme device
struct nvme_id_uuid_list *uuid_list: User space destination address to transfer the data

Description

Each UUID List entry is either 0h, the NVMe Invalid UUID, or a valid UUID. Valid UUIDs are those which are non-zero and are not the NVMe Invalid UUID.

See struct nvme_id_uuid_list for the definition of the returned structure.

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_identify_ns_csi(int fd, __u32 nsid, __u8 uuidx, enum nvme_csi csi, void *data)¶: I/O command set specific identify namespace data

Parameters

int fd: File descriptor of nvme device
__u32 nsid: Namespace to identify
__u8 uuidx: UUID Index for differentiating vendor specific encoding
enum nvme_csi csi: Command Set Identifier
void *data: User space destination address to transfer the data

Description

An I/O Command Set specific Identify Namespace data structure is returned for the namespace specified in nsid.

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_identify_ctrl_csi(int fd, enum nvme_csi csi, void *data)¶: I/O command set specific Identify Controller data

Parameters

int fd: File descriptor of nvme device
enum nvme_csi csi: Command Set Identifier
void *data: User space destination address to transfer the data

Description

An I/O Command Set specific Identify Controller data structure is returned to the host for the controller processing the command. The specific Identify Controller data structure to be returned is specified by csi.

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_identify_active_ns_list_csi(int fd, __u32 nsid, enum nvme_csi csi, struct nvme_ns_list *ns_list)¶: Active namespace ID list associated with a specified I/O command set

Parameters

int fd: File descriptor of nvme device
__u32 nsid: Return namespaces greater than this identifier
enum nvme_csi csi: Command Set Identifier
struct nvme_ns_list *ns_list: User space destination address to transfer the data

Description

A list of 1024 namespace IDs is returned to the host containing active NSIDs in increasing order that are greater than the value specified in the Namespace Identifier (nsid) field of the command and matching the I/O Command Set specified in the csi argument.

See struct nvme_ns_list for the definition of the returned structure.

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_identify_allocated_ns_list_csi(int fd, __u32 nsid, enum nvme_csi csi, struct nvme_ns_list *ns_list)¶: Allocated namespace ID list associated with a specified I/O command set

Parameters

int fd: File descriptor of nvme device
__u32 nsid: Return namespaces greater than this identifier
enum nvme_csi csi: Command Set Identifier
struct nvme_ns_list *ns_list: User space destination address to transfer the data

Description

A list of 1024 namespace IDs is returned to the host containing allocated NSIDs in increasing order that are greater than the value specified in the nsid field of the command and matching the I/O Command Set specified in the csi argument.

See struct nvme_ns_list for the definition of the returned structure.

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_identify_independent_identify_ns(int fd, __u32 nsid, struct nvme_id_independent_id_ns *ns)¶: I/O command set independent Identify namespace data

Parameters

int fd: File descriptor of nvme device
__u32 nsid: Return namespaces greater than this identifier
struct nvme_id_independent_id_ns *ns: I/O Command Set Independent Identify Namespace data structure

Description

The I/O command set independent Identify namespace data structure for the namespace identified with ns is returned to the host.

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_identify_ns_csi_user_data_format(int fd, __u16 user_data_format, __u8 uuidx, enum nvme_csi csi, void *data)¶: Identify namespace user data format

Parameters

int fd: File descriptor of nvme device
__u16 user_data_format: Return namespaces capability of identifier
__u8 uuidx: UUID selection, if supported
enum nvme_csi csi: Command Set Identifier
void *data: User space destination address to transfer the data

Description

Identify Namespace data structure for the specified User Data Format index containing the namespace capabilities for the NVM Command Set.

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_identify_iocs_ns_csi_user_data_format(int fd, __u16 user_data_format, __u8 uuidx, enum nvme_csi csi, void *data)¶: Identify I/O command set namespace data structure

Parameters

int fd: File descriptor of nvme device
__u16 user_data_format: Return namespaces capability of identifier
__u8 uuidx: UUID selection, if supported
enum nvme_csi csi: Command Set Identifier
void *data: User space destination address to transfer the data

Description

I/O Command Set specific Identify Namespace data structure for the specified User Data Format index containing the namespace capabilities for the I/O Command Set specified in the CSI field.

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_nvm_identify_ctrl(int fd, struct nvme_id_ctrl_nvm *id)¶: Identify controller data

Parameters

int fd: File descriptor of nvme device
struct nvme_id_ctrl_nvm *id: User space destination address to transfer the data

Description

Return an identify controller data structure to the host of processing controller.

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_identify_domain_list(int fd, __u16 domid, struct nvme_id_domain_list *list)¶: Domain list data

Parameters

int fd: File descriptor of nvme device
__u16 domid: Domain ID
struct nvme_id_domain_list *list: User space destination address to transfer data

Description

A list of 31 domain IDs is returned to the host containing domain attributes in increasing order that are greater than the value specified in the domid field.

See struct nvme_identify_domain_attr for the definition of the returned structure.

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_identify_endurance_group_list(int fd, __u16 endgrp_id, struct nvme_id_endurance_group_list *list)¶: Endurance group list data

Parameters

int fd: File descriptor of nvme device
__u16 endgrp_id: Endurance group identifier
struct nvme_id_endurance_group_list *list: Array of endurance group identifiers

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_identify_iocs(int fd, __u16 cntlid, struct nvme_id_iocs *iocs)¶: I/O command set data structure

Parameters

int fd: File descriptor of nvme device
__u16 cntlid: Controller ID
struct nvme_id_iocs *iocs: User space destination address to transfer the data

Description

Retrieves list of the controller’s supported io command set vectors. See struct nvme_id_iocs.

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_zns_identify_ns(int fd, __u32 nsid, struct nvme_zns_id_ns *data)¶: ZNS identify namespace data

Parameters

int fd: File descriptor of nvme device
__u32 nsid: Namespace to identify
struct nvme_zns_id_ns *data: User space destination address to transfer the data

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_zns_identify_ctrl(int fd, struct nvme_zns_id_ctrl *id)¶: ZNS identify controller data

Parameters

int fd: File descriptor of nvme device
struct nvme_zns_id_ctrl *id: User space destination address to transfer the data

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_get_log(struct nvme_get_log_args *args)¶: NVMe Admin Get Log command

Parameters

struct nvme_get_log_args *args: struct nvme_get_log_args argument structure

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_get_log_supported_log_pages(int fd, bool rae, struct nvme_supported_log_pages *log)¶: Retrieve nmve supported log pages

Parameters

int fd: File descriptor of nvme device
bool rae: Retain asynchronous events
struct nvme_supported_log_pages *log: Array of LID supported and Effects data structures

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_get_log_error(int fd, unsigned int nr_entries, bool rae, struct nvme_error_log_page *err_log)¶: Retrieve nvme error log

Parameters

int fd: File descriptor of nvme device
unsigned int nr_entries: Number of error log entries allocated
bool rae: Retain asynchronous events
struct nvme_error_log_page *err_log: Array of error logs of size ‘entries’

Description

This log page describes extended error information for a command that completed with error, or may report an error that is not specific to a particular command.

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_get_log_smart(int fd, __u32 nsid, bool rae, struct nvme_smart_log *smart_log)¶: Retrieve nvme smart log

Parameters

int fd: File descriptor of nvme device
__u32 nsid: Optional namespace identifier
bool rae: Retain asynchronous events
struct nvme_smart_log *smart_log: User address to store the smart log

Description

This log page provides SMART and general health information. The information provided is over the life of the controller and is retained across power cycles. To request the controller log page, the namespace identifier specified is FFFFFFFFh. The controller may also support requesting the log page on a per namespace basis, as indicated by bit 0 of the LPA field in the Identify Controller data structure.

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_get_log_fw_slot(int fd, bool rae, struct nvme_firmware_slot *fw_log)¶: Retrieves the controller firmware log

Parameters

int fd: File descriptor of nvme device
bool rae: Retain asynchronous events
struct nvme_firmware_slot *fw_log: User address to store the log page

Description

This log page describes the firmware revision stored in each firmware slot supported. The firmware revision is indicated as an ASCII string. The log page also indicates the active slot number.

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_get_log_changed_ns_list(int fd, bool rae, struct nvme_ns_list *ns_log)¶: Retrieve namespace changed list

Parameters

int fd: File descriptor of nvme device
bool rae: Retain asynchronous events
struct nvme_ns_list *ns_log: User address to store the log page

Description

This log page describes namespaces attached to this controller that have changed since the last time the namespace was identified, been added, or deleted.

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_get_log_cmd_effects(int fd, enum nvme_csi csi, struct nvme_cmd_effects_log *effects_log)¶: Retrieve nvme command effects log

Parameters

int fd: File descriptor of nvme device
enum nvme_csi csi: Command Set Identifier
struct nvme_cmd_effects_log *effects_log: User address to store the effects log

Description

This log page describes the commands that the controller supports and the effects of those commands on the state of the NVM subsystem.

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_get_log_device_self_test(int fd, struct nvme_self_test_log *log)¶: Retrieve the device self test log

Parameters

int fd: File descriptor of nvme device
struct nvme_self_test_log *log: Userspace address of the log payload

Description

The log page indicates the status of an in progress self test and the percent complete of that operation, and the results of the previous 20 self-test operations.

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_get_log_create_telemetry_host(int fd, struct nvme_telemetry_log *log)¶: Create host telemetry log

Parameters

int fd: File descriptor of nvme device
struct nvme_telemetry_log *log: Userspace address of the log payload

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_get_log_telemetry_host(int fd, __u64 offset, __u32 len, void *log)¶: Get Telemetry Host-Initiated log page

Parameters

int fd: File descriptor of nvme device
__u64 offset: Offset into the telemetry data
__u32 len: Length of provided user buffer to hold the log data in bytes
void *log: User address for log page data

Description

Retrieves the Telemetry Host-Initiated log page at the requested offset using the previously existing capture.

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_get_log_telemetry_ctrl(int fd, bool rae, __u64 offset, __u32 len, void *log)¶: Get Telemetry Controller-Initiated log page

Parameters

int fd: File descriptor of nvme device
bool rae: Retain asynchronous events
__u64 offset: Offset into the telemetry data
__u32 len: Length of provided user buffer to hold the log data in bytes
void *log: User address for log page data

Description

Retrieves the Telemetry Controller-Initiated log page at the requested offset using the previously existing capture.

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_get_log_endurance_group(int fd, __u16 endgid, struct nvme_endurance_group_log *log)¶: Get Endurance Group log

Parameters

int fd: File descriptor of nvme device
__u16 endgid: Starting group identifier to return in the list
struct nvme_endurance_group_log *log: User address to store the endurance log

Description

This log page indicates if an Endurance Group Event has occurred for a particular Endurance Group. If an Endurance Group Event has occurred, the details of the particular event are included in the Endurance Group Information log page for that Endurance Group. An asynchronous event is generated when an entry for an Endurance Group is newly added to this log page.

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_get_log_predictable_lat_nvmset(int fd, __u16 nvmsetid, struct nvme_nvmset_predictable_lat_log *log)¶: Predictable Latency Per NVM Set

Parameters

int fd: File descriptor of nvme device
__u16 nvmsetid: NVM set id
struct nvme_nvmset_predictable_lat_log *log: User address to store the predictable latency log

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_get_log_predictable_lat_event(int fd, bool rae, __u32 offset, __u32 len, void *log)¶: Retrieve Predictable Latency Event Aggregate Log Page

Parameters

int fd: File descriptor of nvme device
bool rae: Retain asynchronous events
__u32 offset: Offset into the predictable latency event
__u32 len: Length of provided user buffer to hold the log data in bytes
void *log: User address for log page data

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_get_log_ana(int fd, enum nvme_log_ana_lsp lsp, bool rae, __u64 offset, __u32 len, void *log)¶: Retrieve Asymmetric Namespace Access log page

Parameters

int fd: File descriptor of nvme device
enum nvme_log_ana_lsp lsp: Log specific, see enum nvme_get_log_ana_lsp
bool rae: Retain asynchronous events
__u64 offset: Offset to the start of the log page
__u32 len: The allocated length of the log page
void *log: User address to store the ana log

Description

This log consists of a header describing the log and descriptors containing the asymmetric namespace access information for ANA Groups that contain namespaces that are attached to the controller processing the command.

See struct nvme_ana_rsp_hdr for the definition of the returned structure.

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_get_log_ana_groups(int fd, bool rae, __u32 len, struct nvme_ana_group_desc *log)¶: Retrieve Asymmetric Namespace Access groups only log page

Parameters

int fd: File descriptor of nvme device
bool rae: Retain asynchronous events
__u32 len: The allocated length of the log page
struct nvme_ana_group_desc *log: User address to store the ana group log

Description

See struct nvme_ana_group_desc for the definition of the returned structure.

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_get_log_lba_status(int fd, bool rae, __u64 offset, __u32 len, void *log)¶: Retrieve LBA Status

Parameters

int fd: File descriptor of nvme device
bool rae: Retain asynchronous events
__u64 offset: Offset to the start of the log page
__u32 len: The allocated length of the log page
void *log: User address to store the log page

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_get_log_endurance_grp_evt(int fd, bool rae, __u32 offset, __u32 len, void *log)¶: Retrieve Rotational Media Information

Parameters

int fd: File descriptor of nvme device
bool rae: Retain asynchronous events
__u32 offset: Offset to the start of the log page
__u32 len: The allocated length of the log page
void *log: User address to store the log page

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_get_log_fid_supported_effects(int fd, bool rae, struct nvme_fid_supported_effects_log *log)¶: Retrieve Feature Identifiers Supported and Effects

Parameters

int fd: File descriptor of nvme device
bool rae: Retain asynchronous events
struct nvme_fid_supported_effects_log *log: FID Supported and Effects data structure

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise

int nvme_get_log_mi_cmd_supported_effects(int fd, bool rae, struct nvme_mi_cmd_supported_effects_log *log)¶: displays the MI Commands Supported by the controller

Parameters

int fd: File descriptor of nvme device
bool rae: Retain asynchronous events
struct nvme_mi_cmd_supported_effects_log *log: MI Command Supported and Effects data structure

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise

int nvme_get_log_boot_partition(int fd, bool rae, __u8 lsp, __u32 len, struct nvme_boot_partition *part)¶: Retrieve Boot Partition

Parameters

int fd: File descriptor of nvme device
bool rae: Retain asynchronous events
__u8 lsp: The log specified field of LID
__u32 len: The allocated size, minimum struct nvme_boot_partition
struct nvme_boot_partition *part: User address to store the log page

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise

int nvme_get_log_discovery(int fd, bool rae, __u32 offset, __u32 len, void *log)¶: Retrieve Discovery log page

Parameters

int fd: File descriptor of nvme device
bool rae: Retain asynchronous events
__u32 offset: Offset of this log to retrieve
__u32 len: The allocated size for this portion of the log
void *log: User address to store the discovery log

Description

Supported only by fabrics discovery controllers, returning discovery records.

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_get_log_media_unit_stat(int fd, __u16 domid, struct nvme_media_unit_stat_log *mus)¶: Retrieve Media Unit Status

Parameters

int fd: File descriptor of nvme device
__u16 domid: Domain Identifier selection, if supported
struct nvme_media_unit_stat_log *mus: User address to store the Media Unit statistics log

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise

int nvme_get_log_support_cap_config_list(int fd, __u16 domid, struct nvme_supported_cap_config_list_log *cap)¶: Retrieve Supported Capacity Configuration List

Parameters

int fd: File descriptor of nvme device
__u16 domid: Domain Identifier selection, if supported
struct nvme_supported_cap_config_list_log *cap: User address to store supported capabilities config list

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise

int nvme_get_log_reservation(int fd, bool rae, struct nvme_resv_notification_log *log)¶: Retrieve Reservation Notification

Parameters

int fd: File descriptor of nvme device
bool rae: Retain asynchronous events
struct nvme_resv_notification_log *log: User address to store the reservation log

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise

int nvme_get_log_sanitize(int fd, bool rae, struct nvme_sanitize_log_page *log)¶: Retrieve Sanitize Status

Parameters

int fd: File descriptor of nvme device
bool rae: Retain asynchronous events
struct nvme_sanitize_log_page *log: User address to store the sanitize log

Description

The Sanitize Status log page reports sanitize operation time estimates and information about the most recent sanitize operation.

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_get_log_zns_changed_zones(int fd, __u32 nsid, bool rae, struct nvme_zns_changed_zone_log *log)¶: Retrieve list of zones that have changed

Parameters

int fd: File descriptor of nvme device
__u32 nsid: Namespace ID
bool rae: Retain asynchronous events
struct nvme_zns_changed_zone_log *log: User address to store the changed zone log

Description

The list of zones that have changed state due to an exceptional event.

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_get_log_persistent_event(int fd, enum nvme_pevent_log_action action, __u32 size, void *pevent_log)¶: Retrieve Persistent Event Log

Parameters

int fd: File descriptor of nvme device
enum nvme_pevent_log_action action: Action the controller should take during processing this command
__u32 size: Size of pevent_log
void *pevent_log: User address to store the persistent event log

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_set_features(struct nvme_set_features_args *args)¶: Set a feature attribute

Parameters

struct nvme_set_features_args *args: struct nvme_set_features_args argument structure

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_set_features_data(int fd, __u8 fid, __u32 nsid, __u32 cdw11, bool save, __u32 data_len, void *data, __u32 *result)¶: Helper function for nvme_set_features()

Parameters

int fd: File descriptor of nvme device
__u8 fid: Feature identifier
__u32 nsid: Namespace ID, if applicable
__u32 cdw11: Value to set the feature to
bool save: Save value across power states
__u32 data_len: Length of feature data, if applicable, in bytes
void *data: User address of feature data, if applicable
__u32 *result: The command completion result from CQE dword0

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_set_features_simple(int fd, __u8 fid, __u32 nsid, __u32 cdw11, bool save, __u32 *result)¶: Helper function for nvme_set_features()

Parameters

int fd: File descriptor of nvme device
__u8 fid: Feature identifier
__u32 nsid: Namespace ID, if applicable
__u32 cdw11: Value to set the feature to
bool save: Save value across power states
__u32 *result: The command completion result from CQE dword0

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_set_features_arbitration(int fd, __u8 ab, __u8 lpw, __u8 mpw, __u8 hpw, bool save, __u32 *result)¶: Set arbitration features

Parameters

int fd: File descriptor of nvme device
__u8 ab: Arbitration Burst
__u8 lpw: Low Priority Weight
__u8 mpw: Medium Priority Weight
__u8 hpw: High Priority Weight
bool save: Save value across power states
__u32 *result: The command completion result from CQE dword0

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_set_features_power_mgmt(int fd, __u8 ps, __u8 wh, bool save, __u32 *result)¶: Set power management feature

Parameters

int fd: File descriptor of nvme device
__u8 ps: Power State
__u8 wh: Workload Hint
bool save: Save value across power states
__u32 *result: The command completion result from CQE dword0

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_set_features_lba_range(int fd, __u32 nsid, __u32 nr_ranges, bool save, struct nvme_lba_range_type *data, __u32 *result)¶: Set LBA range feature

Parameters

int fd: File descriptor of nvme device
__u32 nsid: Namespace ID
__u32 nr_ranges: Number of ranges in data
bool save: Save value across power states
struct nvme_lba_range_type *data: User address of feature data
__u32 *result: The command completion result from CQE dword0

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_set_features_temp_thresh(int fd, __u16 tmpth, __u8 tmpsel, enum nvme_feat_tmpthresh_thsel thsel, bool save, __u32 *result)¶: Set temperature threshold feature

Parameters

int fd: File descriptor of nvme device
__u16 tmpth: Temperature Threshold
__u8 tmpsel: Threshold Temperature Select
enum nvme_feat_tmpthresh_thsel thsel: Threshold Type Select
bool save: Save value across power states
__u32 *result: The command completion result from CQE dword0

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_set_features_err_recovery(int fd, __u32 nsid, __u16 tler, bool dulbe, bool save, __u32 *result)¶: Set error recovery feature

Parameters

int fd: File descriptor of nvme device
__u32 nsid: Namespace ID
__u16 tler: Time-limited error recovery value
bool dulbe: Deallocated or Unwritten Logical Block Error Enable
bool save: Save value across power states
__u32 *result: The command completion result from CQE dword0

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_set_features_volatile_wc(int fd, bool wce, bool save, __u32 *result)¶: Set volatile write cache feature

Parameters

int fd: File descriptor of nvme device
bool wce: Write cache enable
bool save: Save value across power states
__u32 *result: The command completion result from CQE dword0

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_set_features_irq_coalesce(int fd, __u8 thr, __u8 time, bool save, __u32 *result)¶: Set IRQ coalesce feature

Parameters

int fd: File descriptor of nvme device
__u8 thr: Aggregation Threshold
__u8 time: Aggregation Time
bool save: Save value across power states
__u32 *result: The command completion result from CQE dword0

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_set_features_irq_config(int fd, __u16 iv, bool cd, bool save, __u32 *result)¶: Set IRQ config feature

Parameters

int fd: File descriptor of nvme device
__u16 iv: Interrupt Vector
bool cd: Coalescing Disable
bool save: Save value across power states
__u32 *result: The command completion result from CQE dword0

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_set_features_write_atomic(int fd, bool dn, bool save, __u32 *result)¶: Set write atomic feature

Parameters

int fd: File descriptor of nvme device
bool dn: Disable Normal
bool save: Save value across power states
__u32 *result: The command completion result from CQE dword0

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_set_features_async_event(int fd, __u32 events, bool save, __u32 *result)¶: Set asynchronous event feature

Parameters

int fd: File descriptor of nvme device
__u32 events: Events to enable
bool save: Save value across power states
__u32 *result: The command completion result from CQE dword0

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_set_features_auto_pst(int fd, bool apste, bool save, struct nvme_feat_auto_pst *apst, __u32 *result)¶: Set autonomous power state feature

Parameters

int fd: File descriptor of nvme device
bool apste: Autonomous Power State Transition Enable
bool save: Save value across power states
struct nvme_feat_auto_pst *apst: Autonomous Power State Transition
__u32 *result: The command completion result from CQE dword0

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_set_features_timestamp(int fd, bool save, __u64 timestamp)¶: Set timestamp feature

Parameters

int fd: File descriptor of nvme device
bool save: Save value across power states
__u64 timestamp: The current timestamp value to assign to this feature

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_set_features_hctm(int fd, __u16 tmt2, __u16 tmt1, bool save, __u32 *result)¶: Set thermal management feature

Parameters

int fd: File descriptor of nvme device
__u16 tmt2: Thermal Management Temperature 2
__u16 tmt1: Thermal Management Temperature 1
bool save: Save value across power states
__u32 *result: The command completion result from CQE dword0

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_set_features_nopsc(int fd, bool noppme, bool save, __u32 *result)¶: Set non-operational power state feature

Parameters

int fd: File descriptor of nvme device
bool noppme: Non-Operational Power State Permissive Mode Enable
bool save: Save value across power states
__u32 *result: The command completion result from CQE dword0

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_set_features_rrl(int fd, __u8 rrl, __u16 nvmsetid, bool save, __u32 *result)¶: Set read recovery level feature

Parameters

int fd: File descriptor of nvme device
__u8 rrl: Read recovery level setting
__u16 nvmsetid: NVM set id
bool save: Save value across power states
__u32 *result: The command completion result from CQE dword0

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_set_features_plm_config(int fd, bool enable, __u16 nvmsetid, bool save, struct nvme_plm_config *data, __u32 *result)¶: Set predictable latency feature

Parameters

int fd: File descriptor of nvme device
bool enable: Predictable Latency Enable
__u16 nvmsetid: NVM Set Identifier
bool save: Save value across power states
struct nvme_plm_config *data: Pointer to structure nvme_plm_config
__u32 *result: The command completion result from CQE dword0

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_set_features_plm_window(int fd, enum nvme_feat_plm_window_select sel, __u16 nvmsetid, bool save, __u32 *result)¶: Set window select feature

Parameters

int fd: File descriptor of nvme device
enum nvme_feat_plm_window_select sel: Window Select
__u16 nvmsetid: NVM Set Identifier
bool save: Save value across power states
__u32 *result: The command completion result from CQE dword0

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_set_features_lba_sts_interval(int fd, __u16 lsiri, __u16 lsipi, bool save, __u32 *result)¶: Set LBA status information feature

Parameters

int fd: File descriptor of nvme device
__u16 lsiri: LBA Status Information Report Interval
__u16 lsipi: LBA Status Information Poll Interval
bool save: Save value across power states
__u32 *result: The command completion result from CQE dword0

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_set_features_host_behavior(int fd, bool save, struct nvme_feat_host_behavior *data)¶: Set host behavior feature

Parameters

int fd: File descriptor of nvme device
bool save: Save value across power states
struct nvme_feat_host_behavior *data: Pointer to structure nvme_feat_host_behavior

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_set_features_sanitize(int fd, bool nodrm, bool save, __u32 *result)¶: Set sanitize feature

Parameters

int fd: File descriptor of nvme device
bool nodrm: No-Deallocate Response Mode
bool save: Save value across power states
__u32 *result: The command completion result from CQE dword0

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_set_features_endurance_evt_cfg(int fd, __u16 endgid, __u8 egwarn, bool save, __u32 *result)¶: Set endurance event config feature

Parameters

int fd: File descriptor of nvme device
__u16 endgid: Endurance Group Identifier
__u8 egwarn: Flags to enable warning, see enum nvme_eg_critical_warning_flags
bool save: Save value across power states
__u32 *result: The command completion result from CQE dword0

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_set_features_sw_progress(int fd, __u8 pbslc, bool save, __u32 *result)¶: Set pre-boot software load count feature

Parameters

int fd: File descriptor of nvme device
__u8 pbslc: Pre-boot Software Load Count
bool save: Save value across power states
__u32 *result: The command completion result from CQE dword0

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_set_features_host_id(int fd, bool exhid, bool save, __u8 *hostid)¶: Set enable extended host identifers feature

Parameters

int fd: File descriptor of nvme device
bool exhid: Enable Extended Host Identifier
bool save: Save value across power states
__u8 *hostid: Host ID to set

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_set_features_resv_mask(int fd, __u32 mask, bool save, __u32 *result)¶: Set reservation notification mask feature

Parameters

int fd: File descriptor of nvme device
__u32 mask: Reservation Notification Mask Field
bool save: Save value across power states
__u32 *result: The command completion result from CQE dword0

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_set_features_resv_persist(int fd, bool ptpl, bool save, __u32 *result)¶: Set persist through power loss feature

Parameters

int fd: File descriptor of nvme device
bool ptpl: Persist Through Power Loss
bool save: Save value across power states
__u32 *result: The command completion result from CQE dword0

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_set_features_write_protect(int fd, enum nvme_feat_nswpcfg_state state, bool save, __u32 *result)¶: Set write protect feature

Parameters

int fd: File descriptor of nvme device
enum nvme_feat_nswpcfg_state state: Write Protection State
bool save: Save value across power states
__u32 *result: The command completion result from CQE dword0

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_get_features(struct nvme_get_features_args *args)¶: Retrieve a feature attribute

Parameters

struct nvme_get_features_args *args: struct nvme_get_features_args argument structure

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_get_features_data(int fd, enum nvme_features_id fid, __u32 nsid, __u32 data_len, void *data, __u32 *result)¶: Helper function for nvme_get_features()

Parameters

int fd: File descriptor of nvme device
enum nvme_features_id fid: Feature identifier
__u32 nsid: Namespace ID, if applicable
__u32 data_len: Length of feature data, if applicable, in bytes
void *data: User address of feature data, if applicable
__u32 *result: The command completion result from CQE dword0

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_get_features_simple(int fd, enum nvme_features_id fid, __u32 nsid, __u32 *result)¶: Helper function for nvme_get_features()

Parameters

int fd: File descriptor of nvme device
enum nvme_features_id fid: Feature identifier
__u32 nsid: Namespace ID, if applicable
__u32 *result: The command completion result from CQE dword0

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_get_features_arbitration(int fd, enum nvme_get_features_sel sel, __u32 *result)¶: Get arbitration feature

Parameters

int fd: File descriptor of nvme device
enum nvme_get_features_sel sel: Select which type of attribute to return, see enum nvme_get_features_sel
__u32 *result: The command completion result from CQE dword0

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_get_features_power_mgmt(int fd, enum nvme_get_features_sel sel, __u32 *result)¶: Get power management feature

Parameters

int fd: File descriptor of nvme device
enum nvme_get_features_sel sel: Select which type of attribute to return, see enum nvme_get_features_sel
__u32 *result: The command completion result from CQE dword0

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_get_features_lba_range(int fd, enum nvme_get_features_sel sel, struct nvme_lba_range_type *data, __u32 *result)¶: Get LBA range feature

Parameters

int fd: File descriptor of nvme device
enum nvme_get_features_sel sel: Select which type of attribute to return, see enum nvme_get_features_sel
struct nvme_lba_range_type *data: User address of feature data, if applicable
__u32 *result: The command completion result from CQE dword0

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_get_features_temp_thresh(int fd, enum nvme_get_features_sel sel, __u32 *result)¶: Get temperature threshold feature

Parameters

int fd: File descriptor of nvme device
enum nvme_get_features_sel sel: Select which type of attribute to return, see enum nvme_get_features_sel
__u32 *result: The command completion result from CQE dword0

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_get_features_err_recovery(int fd, enum nvme_get_features_sel sel, __u32 *result)¶: Get error recovery feature

Parameters

int fd: File descriptor of nvme device
enum nvme_get_features_sel sel: Select which type of attribute to return, see enum nvme_get_features_sel
__u32 *result: The command completion result from CQE dword0

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_get_features_volatile_wc(int fd, enum nvme_get_features_sel sel, __u32 *result)¶: Get volatile write cache feature

Parameters

int fd: File descriptor of nvme device
enum nvme_get_features_sel sel: Select which type of attribute to return, see enum nvme_get_features_sel
__u32 *result: The command completion result from CQE dword0

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_get_features_num_queues(int fd, enum nvme_get_features_sel sel, __u32 *result)¶: Get number of queues feature

Parameters

int fd: File descriptor of nvme device
enum nvme_get_features_sel sel: Select which type of attribute to return, see enum nvme_get_features_sel
__u32 *result: The command completion result from CQE dword0

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_get_features_irq_coalesce(int fd, enum nvme_get_features_sel sel, __u32 *result)¶: Get IRQ coalesce feature

Parameters

int fd: File descriptor of nvme device
enum nvme_get_features_sel sel: Select which type of attribute to return, see enum nvme_get_features_sel
__u32 *result: The command completion result from CQE dword0

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_get_features_irq_config(int fd, enum nvme_get_features_sel sel, __u16 iv, __u32 *result)¶: Get IRQ config feature

Parameters

int fd: File descriptor of nvme device
enum nvme_get_features_sel sel: Select which type of attribute to return, see enum nvme_get_features_sel

__u16 iv

__u32 *result: The command completion result from CQE dword0

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_get_features_write_atomic(int fd, enum nvme_get_features_sel sel, __u32 *result)¶: Get write atomic feature

Parameters

int fd: File descriptor of nvme device
enum nvme_get_features_sel sel: Select which type of attribute to return, see enum nvme_get_features_sel
__u32 *result: The command completion result from CQE dword0

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_get_features_async_event(int fd, enum nvme_get_features_sel sel, __u32 *result)¶: Get asynchronous event feature

Parameters

int fd: File descriptor of nvme device
enum nvme_get_features_sel sel: Select which type of attribute to return, see enum nvme_get_features_sel
__u32 *result: The command completion result from CQE dword0

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_get_features_auto_pst(int fd, enum nvme_get_features_sel sel, struct nvme_feat_auto_pst *apst, __u32 *result)¶: Get autonomous power state feature

Parameters

int fd: File descriptor of nvme device
enum nvme_get_features_sel sel: Select which type of attribute to return, see enum nvme_get_features_sel

struct nvme_feat_auto_pst *apst

__u32 *result: The command completion result from CQE dword0

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_get_features_host_mem_buf(int fd, enum nvme_get_features_sel sel, __u32 *result)¶: Get host memory buffer feature

Parameters

int fd: File descriptor of nvme device
enum nvme_get_features_sel sel: Select which type of attribute to return, see enum nvme_get_features_sel
__u32 *result: The command completion result from CQE dword0

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_get_features_timestamp(int fd, enum nvme_get_features_sel sel, struct nvme_timestamp *ts)¶: Get timestamp feature

Parameters

int fd: File descriptor of nvme device
enum nvme_get_features_sel sel: Select which type of attribute to return, see enum nvme_get_features_sel
struct nvme_timestamp *ts: Current timestamp

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_get_features_kato(int fd, enum nvme_get_features_sel sel, __u32 *result)¶: Get keep alive timeout feature

Parameters

int fd: File descriptor of nvme device
enum nvme_get_features_sel sel: Select which type of attribute to return, see enum nvme_get_features_sel
__u32 *result: The command completion result from CQE dword0

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_get_features_hctm(int fd, enum nvme_get_features_sel sel, __u32 *result)¶: Get thermal management feature

Parameters

int fd: File descriptor of nvme device
enum nvme_get_features_sel sel: Select which type of attribute to return, see enum nvme_get_features_sel
__u32 *result: The command completion result from CQE dword0

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_get_features_nopsc(int fd, enum nvme_get_features_sel sel, __u32 *result)¶: Get non-operational power state feature

Parameters

int fd: File descriptor of nvme device
enum nvme_get_features_sel sel: Select which type of attribute to return, see enum nvme_get_features_sel
__u32 *result: The command completion result from CQE dword0

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_get_features_rrl(int fd, enum nvme_get_features_sel sel, __u32 *result)¶: Get read recovery level feature

Parameters

int fd: File descriptor of nvme device
enum nvme_get_features_sel sel: Select which type of attribute to return, see enum nvme_get_features_sel
__u32 *result: The command completion result from CQE dword0

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_get_features_plm_config(int fd, enum nvme_get_features_sel sel, __u16 nvmsetid, struct nvme_plm_config *data, __u32 *result)¶: Get predictable latency feature

Parameters

int fd: File descriptor of nvme device
enum nvme_get_features_sel sel: Select which type of attribute to return, see enum nvme_get_features_sel
__u16 nvmsetid: NVM set id

struct nvme_plm_config *data

__u32 *result: The command completion result from CQE dword0

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_get_features_plm_window(int fd, enum nvme_get_features_sel sel, __u16 nvmsetid, __u32 *result)¶: Get window select feature

Parameters

int fd: File descriptor of nvme device
enum nvme_get_features_sel sel: Select which type of attribute to return, see enum nvme_get_features_sel
__u16 nvmsetid: NVM set id
__u32 *result: The command completion result from CQE dword0

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_get_features_lba_sts_interval(int fd, enum nvme_get_features_sel sel, __u32 *result)¶: Get LBA status information feature

Parameters

int fd: File descriptor of nvme device
enum nvme_get_features_sel sel: Select which type of attribute to return, see enum nvme_get_features_sel
__u32 *result: The command completion result from CQE dword0

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_get_features_host_behavior(int fd, enum nvme_get_features_sel sel, struct nvme_feat_host_behavior *data, __u32 *result)¶: Get host behavior feature

Parameters

int fd: File descriptor of nvme device
enum nvme_get_features_sel sel: Select which type of attribute to return, see enum nvme_get_features_sel
struct nvme_feat_host_behavior *data: Pointer to structure nvme_feat_host_behavior
__u32 *result: The command completion result from CQE dword0

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_get_features_sanitize(int fd, enum nvme_get_features_sel sel, __u32 *result)¶: Get sanitize feature

Parameters

int fd: File descriptor of nvme device
enum nvme_get_features_sel sel: Select which type of attribute to return, see enum nvme_get_features_sel
__u32 *result: The command completion result from CQE dword0

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_get_features_endurance_event_cfg(int fd, enum nvme_get_features_sel sel, __u16 endgid, __u32 *result)¶: Get endurance event config feature

Parameters

int fd: File descriptor of nvme device
enum nvme_get_features_sel sel: Select which type of attribute to return, see enum nvme_get_features_sel
__u16 endgid: Endurance Group Identifier
__u32 *result: The command completion result from CQE dword0

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_get_features_sw_progress(int fd, enum nvme_get_features_sel sel, __u32 *result)¶: Get software progress feature

Parameters

int fd: File descriptor of nvme device
enum nvme_get_features_sel sel: Select which type of attribute to return, see enum nvme_get_features_sel
__u32 *result: The command completion result from CQE dword0

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_get_features_host_id(int fd, enum nvme_get_features_sel sel, bool exhid, __u32 len, __u8 *hostid)¶: Get host id feature

Parameters

int fd: File descriptor of nvme device
enum nvme_get_features_sel sel: Select which type of attribute to return, see enum nvme_get_features_sel
bool exhid: Enable Extended Host Identifier
__u32 len: Length of hostid
__u8 *hostid: Buffer for returned host ID

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_get_features_resv_mask(int fd, enum nvme_get_features_sel sel, __u32 *result)¶: Get reservation mask feature

Parameters

int fd: File descriptor of nvme device
enum nvme_get_features_sel sel: Select which type of attribute to return, see enum nvme_get_features_sel
__u32 *result: The command completion result from CQE dword0

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_get_features_resv_persist(int fd, enum nvme_get_features_sel sel, __u32 *result)¶: Get reservation persist feature

Parameters

int fd: File descriptor of nvme device
enum nvme_get_features_sel sel: Select which type of attribute to return, see enum nvme_get_features_sel
__u32 *result: The command completion result from CQE dword0

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_get_features_write_protect(int fd, __u32 nsid, enum nvme_get_features_sel sel, __u32 *result)¶: Get write protect feature

Parameters

int fd: File descriptor of nvme device
__u32 nsid: Namespace ID
enum nvme_get_features_sel sel: Select which type of attribute to return, see enum nvme_get_features_sel
__u32 *result: The command completion result from CQE dword0

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_get_features_iocs_profile(int fd, enum nvme_get_features_sel sel, __u32 *result)¶: Get IOCS profile feature

Parameters

int fd: File descriptor of nvme device
enum nvme_get_features_sel sel: Select which type of attribute to return, see enum nvme_get_features_sel
__u32 *result: The command completion result from CQE dword0

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_format_nvm(struct nvme_format_nvm_args *args)¶: Format nvme namespace(s)

Parameters

struct nvme_format_nvm_args *args: struct nvme_format_nvme_args argument structure

Description

The Format NVM command low level formats the NVM media. This command is used by the host to change the LBA data size and/or metadata size. A low level format may destroy all data and metadata associated with all namespaces or only the specific namespace associated with the command

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_ns_mgmt(struct nvme_ns_mgmt_args *args)¶: Issue a Namespace management command

Parameters

struct nvme_ns_mgmt_args *args: struct nvme_ns_mgmt_args Argument structure

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_ns_mgmt_create(int fd, struct nvme_id_ns *ns, __u32 *nsid, __u32 timeout, __u8 csi)¶: Create a non attached namespace

Parameters

int fd: File descriptor of nvme device
struct nvme_id_ns *ns: Namespace identification that defines ns creation parameters
__u32 *nsid: On success, set to the namespace id that was created
__u32 timeout: Override the default timeout to this value in milliseconds; set to 0 to use the system default.
__u8 csi: Command Set Identifier

Description

On successful creation, the namespace exists in the subsystem, but is not attached to any controller. Use the nvme_ns_attach_ctrls() to assign the namespace to one or more controllers.

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_ns_mgmt_delete(int fd, __u32 nsid)¶: Delete a non attached namespace

Parameters

int fd: File descriptor of nvme device
__u32 nsid: Namespace identifier to delete

Description

It is recommended that a namespace being deleted is not attached to any controller. Use the nvme_ns_detach_ctrls() first if the namespace is still attached.

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_ns_attach(struct nvme_ns_attach_args *args)¶: Attach or detach namespace to controller(s)

Parameters

struct nvme_ns_attach_args *args: struct nvme_ns_attach_args Argument structure

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_ns_attach_ctrls(int fd, __u32 nsid, struct nvme_ctrl_list *ctrlist)¶: Attach namespace to controllers

Parameters

int fd: File descriptor of nvme device
__u32 nsid: Namespace ID to attach
struct nvme_ctrl_list *ctrlist: Controller list to modify attachment state of nsid

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_ns_detach_ctrls(int fd, __u32 nsid, struct nvme_ctrl_list *ctrlist)¶: Detach namespace from controllers

Parameters

int fd: File descriptor of nvme device
__u32 nsid: Namespace ID to detach
struct nvme_ctrl_list *ctrlist: Controller list to modify attachment state of nsid

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_fw_download(struct nvme_fw_download_args *args)¶: Download part or all of a firmware image to the controller

Parameters

struct nvme_fw_download_args *args: struct nvme_fw_download_args argument structure

Description

The Firmware Image Download command downloads all or a portion of an image for a future update to the controller. The Firmware Image Download command downloads a new image (in whole or in part) to the controller.

The image may be constructed of multiple pieces that are individually downloaded with separate Firmware Image Download commands. Each Firmware Image Download command includes a Dword Offset and Number of Dwords that specify a dword range.

The new firmware image is not activated as part of the Firmware Image Download command. Use the nvme_fw_commit() to activate a newly downloaded image.

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_fw_commit(struct nvme_fw_commit_args *args)¶: Commit firmware using the specified action

Parameters

struct nvme_fw_commit_args *args: struct nvme_fw_commit_args argument structure

Description

The Firmware Commit command modifies the firmware image or Boot Partitions.

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise. The command status response may specify additional reset actions required to complete the commit process.

int nvme_security_send(struct nvme_security_send_args *args)¶: Security Send command

Parameters

struct nvme_security_send_args *args: struct nvme_security_send argument structure

Description

The Security Send command transfers security protocol data to the controller. The data structure transferred to the controller as part of this command contains security protocol specific commands to be performed by the controller. The data structure transferred may also contain data or parameters associated with the security protocol commands.

The security data is protocol specific and is not defined by the NVMe specification.

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_security_receive(struct nvme_security_receive_args *args)¶: Security Receive command

Parameters

struct nvme_security_receive_args *args: struct nvme_security_receive argument structure

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_get_lba_status(struct nvme_get_lba_status_args *args)¶: Retrieve information on possibly unrecoverable LBAs

Parameters

struct nvme_get_lba_status_args *args: struct nvme_get_lba_status_args argument structure

Description

The Get LBA Status command requests information about Potentially Unrecoverable LBAs. Refer to the specification for action type descriptions.

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_directive_send(struct nvme_directive_send_args *args)¶: Send directive command

Parameters

struct nvme_directive_send_args *args: struct nvme_directive_send_args argument structure

Description

Directives is a mechanism to enable host and NVM subsystem or controller information exchange. The Directive Send command transfers data related to a specific Directive Type from the host to the controller.

See the NVMe specification for more information.

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_directive_send_id_endir(int fd, __u32 nsid, bool endir, enum nvme_directive_dtype dtype, struct nvme_id_directives *id)¶: Directive Send Enable Directive

Parameters

int fd: File descriptor of nvme device
__u32 nsid: Namespace Identifier
bool endir: Enable Directive
enum nvme_directive_dtype dtype: Directive Type
struct nvme_id_directives *id: Pointer to structure nvme_id_directives

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_directive_send_stream_release_identifier(int fd, __u32 nsid, __u16 stream_id)¶: Directive Send Stream release

Parameters

int fd: File descriptor of nvme device
__u32 nsid: Namespace ID
__u16 stream_id: Stream identifier

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_directive_send_stream_release_resource(int fd, __u32 nsid)¶: Directive Send Stream release resources

Parameters

int fd: File descriptor of nvme device
__u32 nsid: Namespace ID

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_directive_recv(struct nvme_directive_recv_args *args)¶: Receive directive specific data

Parameters

struct nvme_directive_recv_args *args: struct nvme_directive_recv_args argument structure

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_directive_recv_identify_parameters(int fd, __u32 nsid, struct nvme_id_directives *id)¶: Directive receive identifier parameters

Parameters

int fd: File descriptor of nvme device
__u32 nsid: Namespace ID
struct nvme_id_directives *id: Identify parameters buffer

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_directive_recv_stream_parameters(int fd, __u32 nsid, struct nvme_streams_directive_params *parms)¶: Directive receive stream parameters

Parameters

int fd: File descriptor of nvme device
__u32 nsid: Namespace ID
struct nvme_streams_directive_params *parms: Streams directive parameters buffer

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_directive_recv_stream_status(int fd, __u32 nsid, unsigned int nr_entries, struct nvme_streams_directive_status *id)¶: Directive receive stream status

Parameters

int fd: File descriptor of nvme device
__u32 nsid: Namespace ID
unsigned int nr_entries: Number of streams to receive
struct nvme_streams_directive_status *id: Stream status buffer

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_directive_recv_stream_allocate(int fd, __u32 nsid, __u16 nsr, __u32 *result)¶: Directive receive stream allocate

Parameters

int fd: File descriptor of nvme device
__u32 nsid: Namespace ID
__u16 nsr: Namespace Streams Requested
__u32 *result: If successful, the CQE dword0 value

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_capacity_mgmt(struct nvme_capacity_mgmt_args *args)¶: Capacity management command

Parameters

struct nvme_capacity_mgmt_args *args: struct nvme_capacity_mgmt_args argument structure

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_lockdown(struct nvme_lockdown_args *args)¶: Issue lockdown command

Parameters

struct nvme_lockdown_args *args: struct nvme_lockdown_args argument structure

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_set_property(struct nvme_set_property_args *args)¶: Set controller property

Parameters

struct nvme_set_property_args *args: struct nvme_set_property_args argument structure

Description

This is an NVMe-over-Fabrics specific command, not applicable to PCIe. These properties align to the PCI MMIO controller registers.

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_get_property(struct nvme_get_property_args *args)¶: Get a controller property

Parameters

struct nvme_get_property_args *args: struct nvme_get_propert_args argument structure

Description

This is an NVMe-over-Fabrics specific command, not applicable to PCIe. These properties align to the PCI MMIO controller registers.

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_sanitize_nvm(struct nvme_sanitize_nvm_args *args)¶: Start a sanitize operation

Parameters

struct nvme_sanitize_nvm_args *args: struct nvme_sanitize_nvm_args argument structure

Description

A sanitize operation alters all user data in the NVM subsystem such that recovery of any previous user data from any cache, the non-volatile media, or any Controller Memory Buffer is not possible.

The Sanitize command starts a sanitize operation or to recover from a previously failed sanitize operation. The sanitize operation types that may be supported are Block Erase, Crypto Erase, and Overwrite. All sanitize operations are processed in the background, i.e., completion of the sanitize command does not indicate completion of the sanitize operation.

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_dev_self_test(struct nvme_dev_self_test_args *args)¶: Start or abort a self test

Parameters

struct nvme_dev_self_test_args *args: struct nvme_dev_self_test argument structure

Description

The Device Self-test command starts a device self-test operation or abort a device self-test operation. A device self-test operation is a diagnostic testing sequence that tests the integrity and functionality of the controller and may include testing of the media associated with namespaces. The controller may return a response to this command immediately while running the self-test in the background.

Set the ‘nsid’ field to 0 to not include namepsaces in the test. Set to 0xffffffff to test all namespaces. All other values tests a specific namespace, if present.

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_virtual_mgmt(struct nvme_virtual_mgmt_args *args)¶: Virtualization resource management

Parameters

struct nvme_virtual_mgmt_args *args: struct nvme_virtual_mgmt_args argument structure

Description

The Virtualization Management command is supported by primary controllers that support the Virtualization Enhancements capability. This command is used for several functions:

Modifying Flexible Resource allocation for the primary controller

Assigning Flexible Resources for secondary controllers

Setting the Online and Offline state for secondary controllers

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_flush(int fd, __u32 nsid)¶: Send an nvme flush command

Parameters

int fd: File descriptor of nvme device
__u32 nsid: Namespace identifier

Description

The Flush command requests that the contents of volatile write cache be made non-volatile.

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_io(struct nvme_io_args *args, __u8 opcode)¶: Submit an nvme user I/O command

Parameters

struct nvme_io_args *args: struct nvme_io_args argument structure
__u8 opcode: Opcode to execute

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_read(struct nvme_io_args *args)¶: Submit an nvme user read command

Parameters

struct nvme_io_args *args: struct nvme_io_args argument structure

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_write(struct nvme_io_args *args)¶: Submit an nvme user write command

Parameters

struct nvme_io_args *args: struct nvme_io_args argument structure

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_compare(struct nvme_io_args *args)¶: Submit an nvme user compare command

Parameters

struct nvme_io_args *args: struct nvme_io_args argument structure

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_write_zeros(struct nvme_io_args *args)¶: Submit an nvme write zeroes command

Parameters

struct nvme_io_args *args: struct nvme_io_args argument structure

Description

The Write Zeroes command sets a range of logical blocks to zero. After successful completion of this command, the value returned by subsequent reads of logical blocks in this range shall be all bytes cleared to 0h until a write occurs to this LBA range.

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_write_uncorrectable(struct nvme_io_args *args)¶: Submit an nvme write uncorrectable command

Parameters

struct nvme_io_args *args: struct nvme_io_args argument structure

Description

The Write Uncorrectable command marks a range of logical blocks as invalid. When the specified logical block(s) are read after this operation, a failure is returned with Unrecovered Read Error status. To clear the invalid logical block status, a write operation on those logical blocks is required.

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_verify(struct nvme_io_args *args)¶: Send an nvme verify command

Parameters

struct nvme_io_args *args: struct nvme_io_args argument structure

Description

The Verify command verifies integrity of stored information by reading data and metadata, if applicable, for the LBAs indicated without transferring any data or metadata to the host.

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_dsm(struct nvme_dsm_args *args)¶: Send an nvme data set management command

Parameters

struct nvme_dsm_args *args: struct nvme_dsm_args argument structure

Description

The Dataset Management command is used by the host to indicate attributes for ranges of logical blocks. This includes attributes like frequency that data is read or written, access size, and other information that may be used to optimize performance and reliability, and may be used to deallocate/unmap/trim those logical blocks.

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_copy(struct nvme_copy_args *args)¶: Copy command

Parameters

struct nvme_copy_args *args: struct nvme_copy_args argument structure

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_resv_acquire(struct nvme_resv_acquire_args *args)¶: Send an nvme reservation acquire

Parameters

struct nvme_resv_acquire_args *args: struct nvme_resv_acquire argument structure

Description

The Reservation Acquire command acquires a reservation on a namespace, preempt a reservation held on a namespace, and abort a reservation held on a namespace.

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_resv_register(struct nvme_resv_register_args *args)¶: Send an nvme reservation register

Parameters

struct nvme_resv_register_args *args: struct nvme_resv_register_args argument structure

Description

The Reservation Register command registers, unregisters, or replaces a reservation key.

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_resv_release(struct nvme_resv_release_args *args)¶: Send an nvme reservation release

Parameters

struct nvme_resv_release_args *args: struct nvme_resv_release_args argument structure

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_resv_report(struct nvme_resv_report_args *args)¶: Send an nvme reservation report

Parameters

struct nvme_resv_report_args *args: struct nvme_resv_report_args argument structure

Description

Returns a Reservation Status data structure to memory that describes the registration and reservation status of a namespace. See the definition for the returned structure, struct nvme_reservation_status, for more details.

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_zns_mgmt_send(struct nvme_zns_mgmt_send_args *args)¶: ZNS management send command

Parameters

struct nvme_zns_mgmt_send_args *args: struct nvme_zns_mgmt_send_args argument structure

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_zns_mgmt_recv(struct nvme_zns_mgmt_recv_args *args)¶: ZNS management receive command

Parameters

struct nvme_zns_mgmt_recv_args *args: struct nvme_zns_mgmt_recv_args argument structure

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_zns_report_zones(int fd, __u32 nsid, __u64 slba, enum nvme_zns_report_options opts, bool extended, bool partial, __u32 data_len, void *data, __u32 timeout, __u32 *result)¶: Return the list of zones

Parameters

int fd: File descriptor of nvme device
__u32 nsid: Namespace ID
__u64 slba: Starting LBA
enum nvme_zns_report_options opts: Reporting options
bool extended: Extended report
bool partial: Partial report requested
__u32 data_len: Length of the data buffer
void *data: Userspace address of the report zones data
__u32 timeout: timeout in ms
__u32 *result: The command completion result from CQE dword0

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_zns_append(struct nvme_zns_append_args *args)¶: Append data to a zone

Parameters

struct nvme_zns_append_args *args: struct nvme_zns_append_args argument structure

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_dim_send(struct nvme_dim_args *args)¶: Send a Discovery Information Management (DIM) command

Parameters

struct nvme_dim_args *args: struct nvme_dim_args argument structure

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

fabrics.h

Fabrics-specific definitions.

struct nvme_fabrics_config¶: Defines all linux nvme fabrics initiator options

Definition

struct nvme_fabrics_config {
  char *host_traddr;
  char *host_iface;
  int queue_size;
  int nr_io_queues;
  int reconnect_delay;
  int ctrl_loss_tmo;
  int fast_io_fail_tmo;
  int keep_alive_tmo;
  int nr_write_queues;
  int nr_poll_queues;
  int tos;
  bool duplicate_connect;
  bool disable_sqflow;
  bool hdr_digest;
  bool data_digest;
  bool tls;
};

Members

host_traddr: Host transport address
host_iface: Host interface name
queue_size: Number of IO queue entries
nr_io_queues: Number of controller IO queues to establish
reconnect_delay: Time between two consecutive reconnect attempts.
ctrl_loss_tmo: Override the default controller reconnect attempt timeout in seconds
fast_io_fail_tmo: Set the fast I/O fail timeout in seconds.
keep_alive_tmo: Override the default keep-alive-timeout to this value in seconds
nr_write_queues: Number of queues to use for exclusively for writing
nr_poll_queues: Number of queues to reserve for polling completions
tos: Type of service
duplicate_connect: Allow multiple connections to the same target
disable_sqflow: Disable controller sq flow control
hdr_digest: Generate/verify header digest (TCP)
data_digest: Generate/verify data digest (TCP)
tls: Start TLS on the connection (TCP)

const char *nvmf_trtype_str(__u8 trtype)¶: Decode TRTYPE field

Parameters

__u8 trtype: value to be decoded

Description

Decode the transport type field in the discovery log page entry.

Return

decoded string

const char *nvmf_adrfam_str(__u8 adrfam)¶: Decode ADRFAM field

Parameters

__u8 adrfam: value to be decoded

Description

Decode the address family field in the discovery log page entry.

Return

decoded string

const char *nvmf_subtype_str(__u8 subtype)¶: Decode SUBTYPE field

Parameters

__u8 subtype: value to be decoded

Description

Decode the subsystem type field in the discovery log page entry.

Return

decoded string

const char *nvmf_treq_str(__u8 treq)¶: Decode TREQ field

Parameters

__u8 treq: value to be decoded

Description

Decode the transport requirements field in the discovery log page entry.

Return

decoded string

const char *nvmf_eflags_str(__u16 eflags)¶: Decode EFLAGS field

Parameters

__u16 eflags: value to be decoded

Description

Decode the EFLAGS field in the discovery log page entry.

Return

decoded string

const char *nvmf_sectype_str(__u8 sectype)¶: Decode SECTYPE field

Parameters

__u8 sectype: value to be decoded

Description

Decode the SECTYPE field in the discovery log page entry.

Return

decoded string

const char *nvmf_prtype_str(__u8 prtype)¶: Decode RDMA Provider type field

Parameters

__u8 prtype: value to be decoded

Description

Decode the RDMA Provider type field in the discovery log page entry.

Return

decoded string

const char *nvmf_qptype_str(__u8 qptype)¶: Decode RDMA QP Service type field

Parameters

__u8 qptype: value to be decoded

Description

Decode the RDMA QP Service type field in the discovery log page entry.

Return

decoded string

const char *nvmf_cms_str(__u8 cms)¶: Decode RDMA connection management service field

Parameters

__u8 cms: value to be decoded

Description

Decode the RDMA connection management service field in the discovery log page entry.

Return

decoded string

void nvmf_default_config(struct nvme_fabrics_config *cfg)¶: Default values for fabrics configuration

Parameters

struct nvme_fabrics_config *cfg: config values to set

Description

Initializes cfg with default values.

void nvmf_update_config(nvme_ctrl_t c, const struct nvme_fabrics_config *cfg)¶: Update fabrics configuration values

Parameters

nvme_ctrl_t c: Controller to be modified
const struct nvme_fabrics_config *cfg: Updated configuration values

Description

Updates the values from c with the configuration values from cfg; all non-default values from cfg will overwrite the values in c.

int nvmf_add_ctrl(nvme_host_t h, nvme_ctrl_t c, const struct nvme_fabrics_config *cfg)¶: Connect a controller and update topology

Parameters

nvme_host_t h: Host to which the controller should be attached
nvme_ctrl_t c: Controller to be connected
const struct nvme_fabrics_config *cfg: Default configuration for the controller

Description

Issues a ‘connect’ command to the NVMe-oF controller and inserts c into the topology using h as parent. c must be initialized and not connected to the topology.

Return

0 on success; on failure errno is set and -1 is returned.

int nvmf_get_discovery_log(nvme_ctrl_t c, struct nvmf_discovery_log **logp, int max_retries)¶: Return the discovery log page

Parameters

nvme_ctrl_t c: Discovery controller to use
struct nvmf_discovery_log **logp: Pointer to the log page to be returned
int max_retries: Number of retries in case of failure

Description

The memory allocated for the log page and returned in logp must be freed by the caller using free().

Note

Consider using nvmf_get_discovery_wargs() instead.

Return

0 on success; on failure -1 is returned and errno is set

struct nvme_get_discovery_args¶: Arguments for nvmf_get_discovery_wargs()

Definition

struct nvme_get_discovery_args {
  nvme_ctrl_t c;
  int args_size;
  int max_retries;
  __u32 *result;
  __u32 timeout;
  __u8 lsp;
};

Members

c: Discovery controller
args_size: Length of the structure
max_retries: Number of retries in case of failure
result: The command completion result from CQE dword0
timeout: Timeout in ms (default: NVME_DEFAULT_IOCTL_TIMEOUT)
lsp: Log specific field (See enum nvmf_log_discovery_lsp)

struct nvmf_discovery_log *nvmf_get_discovery_wargs(struct nvme_get_discovery_args *args)¶: Get the discovery log page with args

Parameters

struct nvme_get_discovery_args *args: Argument structure

Description

This function is similar to nvmf_get_discovery_log(), but takes an extensible args parameter. args provides more options than nvmf_get_discovery_log().

This function performs a get discovery log page (DLP) command and returns the DLP. The memory allocated for the returned DLP must be freed by the caller using free().

Return

Pointer to the discovery log page (to be freed). NULL on failure and errno is set.

char *nvmf_hostnqn_generate()¶: Generate a machine specific host nqn

Parameters

Return

An nvm namespace qualified name string based on the machine identifier, or NULL if not successful.

char *nvmf_hostnqn_from_file()¶: Reads the host nvm qualified name from the config default location in /etc/nvme/

Parameters

Return

The host nqn, or NULL if unsuccessful. If found, the caller is responsible to free the string.

char *nvmf_hostid_from_file()¶: Reads the host identifier from the config default location in /etc/nvme/.

Parameters

Return

The host identifier, or NULL if unsuccessful. If found, the caller: is responsible to free the string.

nvme_ctrl_t nvmf_connect_disc_entry(nvme_host_t h, struct nvmf_disc_log_entry *e, const struct nvme_fabrics_config *defcfg, bool *discover)¶: Connect controller based on the discovery log page entry

Parameters

nvme_host_t h: Host to which the controller should be connected
struct nvmf_disc_log_entry *e: Discovery log page entry
const struct nvme_fabrics_config *defcfg: Default configuration to be used for the new controller
bool *discover: Set to ‘true’ if the new controller is a discovery controller

Return

Pointer to the new controller

bool nvmf_is_registration_supported(nvme_ctrl_t c)¶: check whether registration can be performed.

Parameters

nvme_ctrl_t c: Controller instance

Description

Only discovery controllers (DC) that comply with TP8010 support explicit registration with the DIM PDU. These can be identified by looking at the value of a dctype in the Identify command response. A value of 1 (DDC) or 2 (CDC) indicates that the DC supports explicit registration.

Return

true if controller supports explicit registration. false otherwise.

int nvmf_register_ctrl(nvme_ctrl_t c, enum nvmf_dim_tas tas, __u32 *result)¶: Perform registration task with a DC

Parameters

nvme_ctrl_t c: Controller instance
enum nvmf_dim_tas tas: Task field of the Command Dword 10 (cdw10). Indicates whether to perform a Registration, Deregistration, or Registration-update.
__u32 *result: The command-specific result returned by the DC upon command completion.

Description

Perform registration task with a Discovery Controller (DC). Three tasks are supported: register, deregister, and registration update.

Return

0 on success; on failure -1 is returned and errno is set

linux.h

linux-specific utility functions

int nvme_fw_download_seq(int fd, __u32 size, __u32 xfer, __u32 offset, void *buf)¶: Firmware download sequence

Parameters

int fd: File descriptor of nvme device
__u32 size: Total size of the firmware image to transfer
__u32 xfer: Maximum size to send with each partial transfer
__u32 offset: Starting offset to send with this firmware download
void *buf: Address of buffer containing all or part of the firmware image.

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

enum nvme_telemetry_da¶: Telemetry Log Data Area

Constants

NVME_TELEMETRY_DA_1: Data Area 1
NVME_TELEMETRY_DA_2: Data Area 2
NVME_TELEMETRY_DA_3: Data Area 3
NVME_TELEMETRY_DA_4: Data Area 4

int nvme_get_ctrl_telemetry(int fd, bool rae, struct nvme_telemetry_log **log, enum nvme_telemetry_da da, size_t *size)¶: Get controller telemetry log

Parameters

int fd: File descriptor of nvme device
bool rae: Retain asynchronous events
struct nvme_telemetry_log **log: On success, set to the value of the allocated and retrieved log.
enum nvme_telemetry_da da: Log page data area, valid values: enum nvme_telemetry_da
size_t *size: Ptr to the telemetry log size, so it can be returned

Description

The total size allocated can be calculated as:: (nvme_telemetry_log da size + 1) * NVME_LOG_TELEM_BLOCK_SIZE.

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_get_host_telemetry(int fd, struct nvme_telemetry_log **log, enum nvme_telemetry_da da, size_t *size)¶: Get host telemetry log

Parameters

int fd: File descriptor of nvme device
struct nvme_telemetry_log **log: On success, set to the value of the allocated and retrieved log.
enum nvme_telemetry_da da: Log page data area, valid values: enum nvme_telemetry_da
size_t *size: Ptr to the telemetry log size, so it can be returned

Description

The total size allocated can be calculated as:: (nvme_telemetry_log da size + 1) * NVME_LOG_TELEM_BLOCK_SIZE.

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_get_new_host_telemetry(int fd, struct nvme_telemetry_log **log, enum nvme_telemetry_da da, size_t *size)¶: Get new host telemetry log

Parameters

int fd: File descriptor of nvme device
struct nvme_telemetry_log **log: On success, set to the value of the allocated and retrieved log.
enum nvme_telemetry_da da: Log page data area, valid values: enum nvme_telemetry_da
size_t *size: Ptr to the telemetry log size, so it can be returned

Description

The total size allocated can be calculated as:: (nvme_telemetry_log da size + 1) * NVME_LOG_TELEM_BLOCK_SIZE.

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_get_log_page(int fd, __u32 xfer_len, struct nvme_get_log_args *args)¶: Get log page data

Parameters

int fd: File descriptor of nvme device
__u32 xfer_len: Max log transfer size per request to split the total.
struct nvme_get_log_args *args: struct nvme_get_log_args argument structure

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_get_ana_log_len(int fd, size_t *analen)¶: Retrieve size of the current ANA log

Parameters

int fd: File descriptor of nvme device
size_t *analen: Pointer to where the length will be set on success

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_get_logical_block_size(int fd, __u32 nsid, int *blksize)¶: Retrieve block size

Parameters

int fd: File descriptor of nvme device
__u32 nsid: Namespace id
int *blksize: Pointer to where the block size will be set on success

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_get_lba_status_log(int fd, bool rae, struct nvme_lba_status_log **log)¶: Retrieve the LBA Status log page

Parameters

int fd: File descriptor of the nvme device
bool rae: Retain asynchronous events
struct nvme_lba_status_log **log: On success, set to the value of the allocated and retrieved log.

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_namespace_attach_ctrls(int fd, __u32 nsid, __u16 num_ctrls, __u16 *ctrlist)¶: Attach namespace to controller(s)

Parameters

int fd: File descriptor of nvme device
__u32 nsid: Namespace ID to attach
__u16 num_ctrls: Number of controllers in ctrlist
__u16 *ctrlist: List of controller IDs to perform the attach action

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_namespace_detach_ctrls(int fd, __u32 nsid, __u16 num_ctrls, __u16 *ctrlist)¶: Detach namespace from controller(s)

Parameters

int fd: File descriptor of nvme device
__u32 nsid: Namespace ID to detach
__u16 num_ctrls: Number of controllers in ctrlist
__u16 *ctrlist: List of controller IDs to perform the detach action

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_open(const char *name)¶: Open an nvme controller or namespace device

Parameters

const char *name: The basename of the device to open

Description

This will look for the handle in /dev/ and validate the name and filetype match linux conventions.

Return

A file descriptor for the device on a successful open, or -1 with errno set otherwise.

enum nvme_hmac_alg¶: HMAC algorithm

Constants

NVME_HMAC_ALG_NONE: No HMAC algorithm
NVME_HMAC_ALG_SHA2_256: SHA2-256
NVME_HMAC_ALG_SHA2_384: SHA2-384
NVME_HMAC_ALG_SHA2_512: SHA2-512

int nvme_gen_dhchap_key(char *hostnqn, enum nvme_hmac_alg hmac, unsigned int key_len, unsigned char *secret, unsigned char *key)¶: DH-HMAC-CHAP key generation

Parameters

char *hostnqn: Host NVMe Qualified Name
enum nvme_hmac_alg hmac: HMAC algorithm
unsigned int key_len: Output key length
unsigned char *secret: Secret to used for digest
unsigned char *key: Generated DH-HMAC-CHAP key

Return

If key generation was successful the function returns 0 or -1 with errno set otherwise.

mi.h - NVMe Management Interface library (libnvme-mi) definitions.

These provide an abstraction for the MI messaging between controllers and a host, typically over an MCTP-over-i2c link to a NVMe device, used as part of the out-of-band management of a system.

We have a few data structures define here to reflect the topology of a MI connection with an NVMe subsystem:

nvme_mi_ep_t: an MI endpoint - our mechanism of communication with a NVMe subsystem. For MCTP, an endpoint will be the component that holds the MCTP address (EID), and receives our request message.

endpoints are defined in the NVMe-MI spec, and are specific to the MI interface.

Each endpoint will provide access to one or more of:

nvme_mi_ctrl_t: a NVMe controller, as defined by the NVMe base spec. The controllers are responsible for processing any NVMe standard commands (eg, the Admin command set). An endpoint (nvme_mi_ep_t) may provide access to multiple controllers - so each of the controller- type commands will require a nvme_mi_ctrl_t to be specified, rather than an endpoint

A couple of conventions with the libnvme-mi API:

All types and functions have the nvme_mi prefix, to distinguish from the libnvme core.

We currently support either MI commands and Admin commands. The former adds a _mi prefix, the latter an _admin prefix. [This does result in the MI functions having a double _mi, like nvme_mi_mi_subsystem_health_status_poll, which is apparently amusing for our German-speaking readers]

For return values: unless specified in the per-function documentation, all functions:

return 0 on success

return -1, with errno set, for errors communicating with the MI device, either in request or response data

return >1 on MI status errors. This value is the 8-bit MI status value, represented by enum nvme_mi_resp_status. Note that the status values may be vendor-defined above 0xe0.

For the second case, we have a few conventions for errno values:

EPROTO: response data violated the MI protocol, and libnvme cannot validly interpret the response

EIO: Other I/O error communicating with device (eg., valid but unexpected response data)

EINVAL: invalid input arguments for a command

In line with the core NVMe API, the Admin command functions take an _args structure to provide the command-specific parameters. However, for the MI interface, the fd and timeout members of these _args structs are ignored.

References to the specifications here will either to be the NVM Express Management Interface (“NVMe-MI”) or the NVM Express Base specification (“NVMe”). At the time of writing, the versions we’re referencing here are:

NVMe-MI 1.2b

NVMe 2.0b

with a couple of accommodations for older spec types, particularly NVMe-MI 1.1, where possible.

NVME_MI_MSGTYPE_NVME¶

NVME_MI_MSGTYPE_NVME ()

MCTP message type for NVMe-MI messages.

Parameters

Description

This is defined by MCTP, but is referenced as part of the NVMe-MI message spec. This is the MCTP NVMe message type (0x4), with the message-integrity bit (0x80) set.

enum nvme_mi_message_type¶: NVMe-MI message type field.

Constants

NVME_MI_MT_CONTROL: NVME-MI Control Primitive
NVME_MI_MT_MI: NVMe-MI command
NVME_MI_MT_ADMIN: NVMe Admin command
NVME_MI_MT_PCIE: PCIe command

Description

Used as byte 1 of both request and response messages (NMIMT bits of NMP byte). Not to be confused with the MCTP message type in byte 0.

enum nvme_mi_ror¶: Request or response field.

Constants

NVME_MI_ROR_REQ: request message
NVME_MI_ROR_RSP: response message

enum nvme_mi_resp_status¶: values for the response status field

Constants

NVME_MI_RESP_SUCCESS: success
NVME_MI_RESP_MPR: More Processing Required
NVME_MI_RESP_INTERNAL_ERR: Internal Error
NVME_MI_RESP_INVALID_OPCODE: Invalid command opcode
NVME_MI_RESP_INVALID_PARAM: Invalid command parameter
NVME_MI_RESP_INVALID_CMD_SIZE: Invalid command size
NVME_MI_RESP_INVALID_INPUT_SIZE: Invalid command input data size
NVME_MI_RESP_ACCESS_DENIED: Access Denied
NVME_MI_RESP_VPD_UPDATES_EXCEEDED: More VPD updates than allowed
NVME_MI_RESP_PCIE_INACCESSIBLE: PCIe functionality currently unavailable
NVME_MI_RESP_MEB_SANITIZED: MEB has been cleared due to sanitize
NVME_MI_RESP_ENC_SERV_FAILURE: Enclosure services process failed
NVME_MI_RESP_ENC_SERV_XFER_FAILURE: Transfer with enclosure services failed
NVME_MI_RESP_ENC_FAILURE: Unreoverable enclosure failure
NVME_MI_RESP_ENC_XFER_REFUSED: Enclosure services transfer refused
NVME_MI_RESP_ENC_FUNC_UNSUP: Unsupported enclosure services function
NVME_MI_RESP_ENC_SERV_UNAVAIL: Enclosure services unavailable
NVME_MI_RESP_ENC_DEGRADED: Noncritical failure detected by enc. services
NVME_MI_RESP_SANITIZE_IN_PROGRESS: Command prohibited during sanitize

struct nvme_mi_msg_hdr¶: General MI message header.

Definition

struct nvme_mi_msg_hdr {
  __u8 type;
  __u8 nmp;
  __u8 meb;
  __u8 rsvd0;
};

Members

type: MCTP message type, will always be NVME_MI_MSGTYPE_NVME
nmp: NVMe-MI message parameters (including MI message type)
meb: Management Endpoint Buffer flag; unused for libnvme-mi implementation
rsvd0: currently reserved

Description

Wire format shared by both request and response messages, per NVMe-MI section 3.1. This is used for all message types, MI and Admin.

struct nvme_mi_msg_resp¶: Generic response type.

Definition

struct nvme_mi_msg_resp {
  struct nvme_mi_msg_hdr hdr;
  __u8 status;
  __u8 rsvd0[3];
};

Members

hdr: the general request/response message header
status: response status value (see enum nvme_mi_resp_status)
rsvd0: reserved data, may be defined by specific response

Description

Every response will start with one of these; command-specific responses will define parts of the reserved data, and may add further fields.

enum nvme_mi_mi_opcode¶: Operation code for supported NVMe-MI commands.

Constants

nvme_mi_mi_opcode_mi_data_read: Read NVMe-MI Data Structure
nvme_mi_mi_opcode_subsys_health_status_poll: Subsystem Health Status Poll
nvme_mi_mi_opcode_configuration_set: MI Configuration Set
nvme_mi_mi_opcode_configuration_get: MI Configuration Get

struct nvme_mi_mi_req_hdr¶: MI request message header.

Definition

struct nvme_mi_mi_req_hdr {
  struct nvme_mi_msg_hdr hdr;
  __u8 opcode;
  __u8 rsvd0[3];
  __le32 cdw0, cdw1;
};

Members

hdr: generic MI message header
opcode: opcode (OPC) for the specific MI command
rsvd0: reserved bytes
cdw0: Management Request Doubleword 0 - command specific usage
cdw1: Management Request Doubleword 1 - command specific usage

Description

Wire format for MI request message headers, defined in section 5 of NVMe-MI.

struct nvme_mi_mi_resp_hdr¶: MI response message header.

Definition

struct nvme_mi_mi_resp_hdr {
  struct nvme_mi_msg_hdr hdr;
  __u8 status;
  __u8 nmresp[3];
};

Members

hdr: generic MI message header
status: generic response status from command; non-zero on failure.
nmresp: NVMe Management Response: command-type-specific response data

Description

Wire format for MI response message header, defined in section 5 of NVMe-MI.

enum nvme_mi_dtyp¶: Data Structure Type field.

Constants

nvme_mi_dtyp_subsys_info: NVM Subsystem Information
nvme_mi_dtyp_port_info: Port information
nvme_mi_dtyp_ctrl_list: Controller List
nvme_mi_dtyp_ctrl_info: Controller Information
nvme_mi_dtyp_opt_cmd_support: Optionally Supported Command List
nvme_mi_dtyp_meb_support: Management Endpoint Buffer Command Support List

Description

Data Structure Type field for Read NVMe-MI Data Structure command, used to indicate the particular structure to query from the endpoint.

enum nvme_mi_config_id¶: NVMe-MI Configuration identifier.

Constants

NVME_MI_CONFIG_SMBUS_FREQ: Current SMBus/I2C frequency
NVME_MI_CONFIG_HEALTH_STATUS_CHANGE: Health Status change - used to clear health status bits in CCS bits of status poll. Only for Set ops.
NVME_MI_CONFIG_MCTP_MTU: MCTP maximum transmission unit size of port specified in dw 0

Description

Configuration parameters for the MI Get/Set Configuration commands.

See :c:type:`nvme_mi_mi_config_get`() and :c:type:`nvme_mi_config_set`().

enum nvme_mi_config_smbus_freq¶: SMBus/I2C frequency values

Constants

NVME_MI_CONFIG_SMBUS_FREQ_100kHz: 100kHz
NVME_MI_CONFIG_SMBUS_FREQ_400kHz: 400kHz
NVME_MI_CONFIG_SMBUS_FREQ_1MHz: 1MHz

Description

Values used in the SMBus Frequency device configuration. See :c:type:`nvme_mi_mi_config_get_smbus_freq`() and :c:type:`nvme_mi_mi_config_set_smbus_freq`().

struct nvme_mi_admin_req_hdr¶: Admin command request header.

Definition

struct nvme_mi_admin_req_hdr {
  struct nvme_mi_msg_hdr hdr;
  __u8 opcode;
  __u8 flags;
  __le16 ctrl_id;
  __le32 cdw1, cdw2, cdw3, cdw4, cdw5;
  __le32 doff;
  __le32 dlen;
  __le32 rsvd0, rsvd1;
  __le32 cdw10, cdw11, cdw12, cdw13, cdw14, cdw15;
};

Members

hdr: Generic MI message header
opcode: Admin command opcode (using enum nvme_admin_opcode)
flags: Command Flags, indicating dlen and doff validity; Only defined in NVMe-MI version 1.1, no fields defined in 1.2 (where the dlen/doff are always considered valid).
ctrl_id: Controller ID target of command
cdw1: Submission Queue Entry doubleword 1
cdw2: Submission Queue Entry doubleword 2
cdw3: Submission Queue Entry doubleword 3
cdw4: Submission Queue Entry doubleword 4
cdw5: Submission Queue Entry doubleword 5
doff: Offset of data to return from command
dlen: Length of sent/returned data
rsvd0: Reserved
rsvd1: Reserved
cdw10: Submission Queue Entry doubleword 10
cdw11: Submission Queue Entry doubleword 11
cdw12: Submission Queue Entry doubleword 12
cdw13: Submission Queue Entry doubleword 13
cdw14: Submission Queue Entry doubleword 14
cdw15: Submission Queue Entry doubleword 15

Description

Wire format for Admin command message headers, defined in section 6 of NVMe-MI.

struct nvme_mi_admin_resp_hdr¶: Admin command response header.

Definition

struct nvme_mi_admin_resp_hdr {
  struct nvme_mi_msg_hdr hdr;
  __u8 status;
  __u8 rsvd0[3];
  __le32 cdw0, cdw1, cdw3;
};

Members

hdr: Generic MI message header
status: Generic response code, non-zero on failure
rsvd0: Reserved
cdw0: Completion Queue Entry doubleword 0
cdw1: Completion Queue Entry doubleword 1
cdw3: Completion Queue Entry doubleword 3

Description

This is the generic response format with the three doublewords of completion queue data, plus optional response data.

const char *nvme_mi_status_to_string(int status)¶: return a string representation of the MI status.

Parameters

int status: MI response status

Description

Gives a string description of status, as per section 4.1.2 of the NVMe-MI spec. The status value should be of type NVME_STATUS_MI, and extracted from the return value using nvme_status_get_value().

Returned string is const, and should not be free()ed.

Return

A string representing the status value

nvme_root_t nvme_mi_create_root(FILE *fp, int log_level)¶: Create top-level MI (root) handle.

Parameters

FILE *fp: File descriptor for logging messages
int log_level: Logging level to use

Description

Create the top-level (library) handle for creating subsequent endpoint objects. Similar to nvme_create_root(), but we provide this to allow linking without the core libnvme.

See nvme_create_root.

Return

new root object, or NULL on failure.

void nvme_mi_free_root(nvme_root_t root)¶: Free root object.

Parameters

nvme_root_t root: root to free

type nvme_mi_ep_t¶: MI Endpoint object.

Description

Represents our communication endpoint on the remote MI-capable device. To be used for direct MI commands for the endpoint (through the nvme_mi_mi_* functions(), or to communicate with individual controllers (see nvme_mi_init_ctrl).

Endpoints are created through a transport-specific constructor; currently only MCTP-connected endpoints are supported, through nvme_mi_open_mctp. Subsequent operations on the endpoint (and related controllers) are transport-independent.

nvme_mi_ep_t nvme_mi_first_endpoint(nvme_root_t m)¶: Start endpoint iterator

Parameters

nvme_root_t m: nvme_root_t object

Return

first MI endpoint object under this root, or NULL if no endpoints: are present.

Description

See: nvme_mi_next_endpoint, nvme_mi_for_each_endpoint

nvme_mi_ep_t nvme_mi_next_endpoint(nvme_root_t m, nvme_mi_ep_t e)¶: Continue endpoint iterator

Parameters

nvme_root_t m: nvme_root_t object
nvme_mi_ep_t e: nvme_mi_ep_t current position of iterator

Return

next endpoint MI endpoint object after e under this root, or NULL: if no further endpoints are present.

Description

See: nvme_mi_first_endpoint, nvme_mi_for_each_endpoint

nvme_mi_for_each_endpoint¶

nvme_mi_for_each_endpoint (m, e)

Iterator for NVMe-MI endpoints.

Parameters

m: nvme_root_t containing endpoints
e: nvme_mi_ep_t object, set on each iteration

nvme_mi_for_each_endpoint_safe¶

nvme_mi_for_each_endpoint_safe (m, e, _e)

Iterator for NVMe-MI endpoints, allowing deletion during traversal

Parameters

m: nvme_root_t containing endpoints
e: nvme_mi_ep_t object, set on each iteration
_e: nvme_mi_ep_t object used as temporary storage

int nvme_mi_ep_set_timeout(nvme_mi_ep_t ep, unsigned int timeout_ms)¶: set a timeout for NVMe-MI responses

Parameters

nvme_mi_ep_t ep: MI endpoint object
unsigned int timeout_ms: Timeout for MI responses, given in milliseconds

void nvme_mi_ep_set_mprt_max(nvme_mi_ep_t ep, unsigned int mprt_max_ms)¶: set the maximum wait time for a More Processing Required response

Parameters

nvme_mi_ep_t ep: MI endpoint object
unsigned int mprt_max_ms: Maximum more processing required wait time

Description

NVMe-MI endpoints may respond to a request with a “More Processing Required” response; this also includes a hint on the worst-case processing time for the eventual response data, with a specification-defined maximum of 65.535 seconds.

This function provides a way to limit the maximum time we’re prepared to wait for the final response. Specify zero in mprt_max_ms for no limit. This should be larger than the command/response timeout set in :c:type:`nvme_mi_ep_set_timeout`().

unsigned int nvme_mi_ep_get_timeout(nvme_mi_ep_t ep)¶: get the current timeout value for NVMe-MI responses

Parameters

nvme_mi_ep_t ep: MI endpoint object

Description

Returns the current timeout value, in milliseconds, for this endpoint.

type nvme_mi_ctrl_t¶: NVMe-MI Controller object.

Description

Provides NVMe command functionality, through the MI interface.

nvme_mi_ctrl_t nvme_mi_first_ctrl(nvme_mi_ep_t ep)¶: Start controller iterator

Parameters

nvme_mi_ep_t ep: nvme_mi_ep_t object

Return

first MI controller object under this root, or NULL if no controllers: are present.

Description

See: nvme_mi_next_ctrl, nvme_mi_for_each_ctrl

nvme_mi_ctrl_t nvme_mi_next_ctrl(nvme_mi_ep_t ep, nvme_mi_ctrl_t c)¶: Continue ctrl iterator

Parameters

nvme_mi_ep_t ep: nvme_mi_ep_t object
nvme_mi_ctrl_t c: nvme_mi_ctrl_t current position of iterator

Return

next MI controller object after c under this endpoint, or NULL: if no further controllers are present.

Description

See: nvme_mi_first_ctrl, nvme_mi_for_each_ctrl

nvme_mi_for_each_ctrl¶

nvme_mi_for_each_ctrl (ep, c)

Iterator for NVMe-MI controllers.

Parameters

ep: nvme_mi_ep_t containing endpoints
c: nvme_mi_ctrl_t object, set on each iteration

Description

Allows iteration of the list of controllers behind an endpoint. Unless the controllers have already been created explicitly, you’ll probably want to call :c:type:`nvme_mi_scan_ep`() to scan for the controllers first.

See: :c:type:`nvme_mi_scan_ep`()

nvme_mi_for_each_ctrl_safe¶

nvme_mi_for_each_ctrl_safe (ep, c, _c)

Iterator for NVMe-MI controllers, allowing deletion during traversal

Parameters

ep: nvme_mi_ep_t containing controllers
c: nvme_mi_ctrl_t object, set on each iteration
_c: nvme_mi_ctrl_t object used as temporary storage

Description

Allows iteration of the list of controllers behind an endpoint, safe against deletion during iteration. Unless the controllers have already been created explicitly (or you’re just iterating to destroy controllers) you’ll probably want to call :c:type:`nvme_mi_scan_ep`() to scan for the controllers first.

See: :c:type:`nvme_mi_scan_ep`()

nvme_mi_ep_t nvme_mi_open_mctp(nvme_root_t root, unsigned int netid, uint8_t eid)¶: Create an endpoint using a MCTP connection.

Parameters

nvme_root_t root: root object to create under
unsigned int netid: MCTP network ID on this system
uint8_t eid: MCTP endpoint ID

Description

Transport-specific endpoint initialization for MI-connected endpoints. Once an endpoint is created, the rest of the API is transport-independent.

See nvme_mi_close

Return

New endpoint object for netid & eid, or NULL on failure.

void nvme_mi_close(nvme_mi_ep_t ep)¶: Close an endpoint connection and release resources, including controller objects.

Parameters

nvme_mi_ep_t ep: Endpoint object to close

nvme_root_t nvme_mi_scan_mctp(void)¶: look for MCTP-connected NVMe-MI endpoints.

Parameters

void: no arguments

Description

This function queries the system MCTP daemon (“mctpd”) over D-Bus, to find MCTP endpoints that report support for NVMe-MI over MCTP.

This requires libvnme-mi to be compiled with D-Bus support; if not, this will return NULL.

Return

A nvme_root_t populated with a set of MCTP-connected endpoints,: or NULL on failure

int nvme_mi_scan_ep(nvme_mi_ep_t ep, bool force_rescan)¶: query an endpoint for its NVMe controllers.

Parameters

nvme_mi_ep_t ep: Endpoint to scan
bool force_rescan: close existing controllers and rescan

Description

This function queries an MI endpoint for the controllers available, by performing an MI Read MI Data Structure command (requesting the controller list). The controllers are stored in the endpoint’s internal list, and can be iterated with nvme_mi_for_each_ctrl.

This will only scan the endpoint once, unless force_rescan is set. If so, all existing controller objects will be freed - the caller must not hold a reference to those across this call.

See: nvme_mi_for_each_ctrl

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

nvme_mi_ctrl_t nvme_mi_init_ctrl(nvme_mi_ep_t ep, __u16 ctrl_id)¶: initialise a NVMe controller.

Parameters

nvme_mi_ep_t ep: Endpoint to create under
__u16 ctrl_id: ID of controller to initialize.

Description

Create a connection to a controller behind the endpoint specified in ep. Controller IDs may be queried from the endpoint through nvme_mi_mi_read_mi_data_ctrl_list.

See nvme_mi_close_ctrl

Return

New controller object, or NULL on failure.

void nvme_mi_close_ctrl(nvme_mi_ctrl_t ctrl)¶: free a controller

Parameters

nvme_mi_ctrl_t ctrl: controller to free

char *nvme_mi_endpoint_desc(nvme_mi_ep_t ep)¶: Get a string describing a MI endpoint.

Parameters

nvme_mi_ep_t ep: endpoint to describe

Description

Generates a human-readable string describing the endpoint, with possibly transport-specific data. The string is allocated during the call, and the caller is responsible for free()-ing the string.

Return

a newly-allocated string containing the endpoint description, or: NULL on failure.

int nvme_mi_mi_read_mi_data_subsys(nvme_mi_ep_t ep, struct nvme_mi_read_nvm_ss_info *s)¶: Perform a Read MI Data Structure command, retrieving subsystem data.

Parameters

nvme_mi_ep_t ep: endpoint for MI communication
struct nvme_mi_read_nvm_ss_info *s: subsystem information to populate

Description

Retrieves the Subsystem information - number of external ports and NVMe version information. See struct nvme_mi_read_nvm_ss_info.

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise..

int nvme_mi_mi_read_mi_data_port(nvme_mi_ep_t ep, __u8 portid, struct nvme_mi_read_port_info *p)¶: Perform a Read MI Data Structure command, retrieving port data.

Parameters

nvme_mi_ep_t ep: endpoint for MI communication
__u8 portid: id of port data to retrieve
struct nvme_mi_read_port_info *p: port information to populate

Description

Retrieves the Port information, for the specified port ID. The subsystem data (from nvme_mi_mi_read_mi_data_subsys) nmp field contains the allowed range of port IDs.

See struct nvme_mi_read_port_info.

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise..

int nvme_mi_mi_read_mi_data_ctrl_list(nvme_mi_ep_t ep, __u8 start_ctrlid, struct nvme_ctrl_list *list)¶: Perform a Read MI Data Structure command, retrieving the list of attached controllers.

Parameters

nvme_mi_ep_t ep: endpoint for MI communication
__u8 start_ctrlid: starting controller ID
struct nvme_ctrl_list *list: controller list to populate

Description

Retrieves the list of attached controllers, with IDs greater than or equal to start_ctrlid.

See struct nvme_ctrl_list.

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise..

int nvme_mi_mi_read_mi_data_ctrl(nvme_mi_ep_t ep, __u16 ctrl_id, struct nvme_mi_read_ctrl_info *ctrl)¶: Perform a Read MI Data Structure command, retrieving controller information

Parameters

nvme_mi_ep_t ep: endpoint for MI communication
__u16 ctrl_id: ID of controller to query
struct nvme_mi_read_ctrl_info *ctrl: controller data to populate

Description

Retrieves the Controller Information Data Structure for the attached controller with ID ctrlid.

See struct nvme_mi_read_ctrl_info.

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise..

int nvme_mi_mi_subsystem_health_status_poll(nvme_mi_ep_t ep, bool clear, struct nvme_mi_nvm_ss_health_status *nshds)¶: Read the Subsystem Health Data Structure from the NVM subsystem

Parameters

nvme_mi_ep_t ep: endpoint for MI communication
bool clear: flag to clear the Composite Controller Status state
struct nvme_mi_nvm_ss_health_status *nshds: subsystem health status data to populate

Description

Retrieves the Subsystem Health Data Structure into nshds. If clear is set, requests that the Composite Controller Status bits are cleared after the read. See NVMe-MI section 5.6 for details on the CCS bits.

See struct nvme_mi_nvm_ss_health_status.

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise..

int nvme_mi_mi_config_get(nvme_mi_ep_t ep, __u32 dw0, __u32 dw1, __u32 *nmresp)¶: query a configuration parameter

Parameters

nvme_mi_ep_t ep: endpoint for MI communication
__u32 dw0: management doubleword 0, containing configuration identifier, plus config-specific fields
__u32 dw1: management doubleword 0, config-specific.
__u32 *nmresp: set to queried configuration data in NMRESP field of response.

Description

Performs a MI Configuration Get command, with the configuration identifier as the LSB of dw0. Other dw0 and dw1 data is configuration-identifier specific.

On a successful Configuration Get, the nmresp pointer will be populated with the bytes from the 3-byte NMRESP field, converted to native endian.

See enum nvme_mi_config_id for identifiers.

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise..

int nvme_mi_mi_config_set(nvme_mi_ep_t ep, __u32 dw0, __u32 dw1)¶: set a configuration parameter

Parameters

nvme_mi_ep_t ep: endpoint for MI communication
__u32 dw0: management doubleword 0, containing configuration identifier, plus config-specific fields
__u32 dw1: management doubleword 0, config-specific.

Description

Performs a MI Configuration Set command, with the command as the LSB of dw0. Other dw0 and dw1 data is configuration-identifier specific.

See enum nvme_mi_config_id for identifiers.

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise..

int nvme_mi_mi_config_get_smbus_freq(nvme_mi_ep_t ep, __u8 port, enum nvme_mi_config_smbus_freq *freq)¶: get configuration: SMBus port frequency

Parameters

nvme_mi_ep_t ep: endpoint for MI communication
__u8 port: port ID to query
enum nvme_mi_config_smbus_freq *freq: output value for current frequency configuration

Description

Performs a MI Configuration Get, to query the current SMBus frequency of the port specified in port. On success, populates freq with the port frequency

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise..

int nvme_mi_mi_config_set_smbus_freq(nvme_mi_ep_t ep, __u8 port, enum nvme_mi_config_smbus_freq freq)¶: set configuration: SMBus port frequency

Parameters

nvme_mi_ep_t ep: endpoint for MI communication
__u8 port: port ID to set
enum nvme_mi_config_smbus_freq freq: new frequency configuration

Description

Performs a MI Configuration Set, to update the current SMBus frequency of the port specified in port.

See struct nvme_mi_read_port_info for the maximum supported SMBus frequency for the port.

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise..

int nvme_mi_mi_config_set_health_status_change(nvme_mi_ep_t ep, __u32 mask)¶: clear CCS bits in health status

Parameters

nvme_mi_ep_t ep: endpoint for MI communication
__u32 mask: bitmask to clear

Description

Performs a MI Configuration Set, to update the current health status poll values of the Composite Controller Status bits. Bits set in mask will be cleared from future health status poll data, and may be re-triggered by a future health change event.

See nvme_mi_mi_subsystem_health_status_poll`(), :c:type:`enum nvme_mi_ccs for values in mask.

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise..

int nvme_mi_mi_config_get_mctp_mtu(nvme_mi_ep_t ep, __u8 port, __u16 *mtu)¶: get configuration: MCTP MTU

Parameters

nvme_mi_ep_t ep: endpoint for MI communication
__u8 port: port ID to query
__u16 *mtu: output value for current MCTP MTU configuration

Description

Performs a MI Configuration Get, to query the current MCTP Maximum Transmission Unit size (MTU) of the port specified in port. On success, populates mtu with the MTU.

The default reset value is 64, corresponding to the MCTP baseline MTU.

Some controllers may also use this as the maximum receive unit size, and may not accept MCTP messages larger than the configured MTU.

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise..

int nvme_mi_mi_config_set_mctp_mtu(nvme_mi_ep_t ep, __u8 port, __u16 mtu)¶: set configuration: MCTP MTU

Parameters

nvme_mi_ep_t ep: endpoint for MI communication
__u8 port: port ID to set
__u16 mtu: new MTU configuration

Description

Performs a MI Configuration Set, to update the current MCTP MTU value for the port specified in port.

Some controllers may also use this as the maximum receive unit size, and may not accept MCTP messages larger than the configured MTU. When setting this value, you will likely need to change the MTU of the local MCTP interface(s) to match.

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise..

int nvme_mi_admin_xfer(nvme_mi_ctrl_t ctrl, struct nvme_mi_admin_req_hdr *admin_req, size_t req_data_size, struct nvme_mi_admin_resp_hdr *admin_resp, off_t resp_data_offset, size_t *resp_data_size)¶: Raw admin transfer interface.

Parameters

nvme_mi_ctrl_t ctrl: controller to send the admin command to
struct nvme_mi_admin_req_hdr *admin_req: request data
size_t req_data_size: size of request data payload
struct nvme_mi_admin_resp_hdr *admin_resp: buffer for response data
off_t resp_data_offset: offset into request data to retrieve from controller
size_t *resp_data_size: size of response data buffer, updated to received size

Description

Performs an arbitrary NVMe Admin command, using the provided request data, in admin_req. The size of the request data payload is specified in req_data_size - this does not include the standard header length (so a header-only request would have a size of 0).

On success, response data is stored in admin_resp, which has an optional appended payload buffer of resp_data_size bytes. The actual payload transferred will be stored in resp_data_size. These sizes do not include the Admin request header, so 0 represents no payload.

As with all Admin commands, we can request partial data from the Admin Response payload, offset by resp_data_offset.

See: struct nvme_mi_admin_req_hdr and struct nvme_mi_admin_resp_hdr.

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise..

int nvme_mi_admin_identify_partial(nvme_mi_ctrl_t ctrl, struct nvme_identify_args *args, off_t offset, size_t size)¶: Perform an Admin identify command, and retrieve partial response data.

Parameters

nvme_mi_ctrl_t ctrl: Controller to process identify command
struct nvme_identify_args *args: Identify command arguments
off_t offset: offset of identify data to retrieve from response
size_t size: size of identify data to return

Description

Perform an Identify command, using the Identify command parameters in args. The offset and size arguments allow the caller to retrieve part of the identify response. See NVMe-MI section 6.2 for the semantics (and some handy diagrams) of the offset & size parameters.

Will return an error if the length of the response data (from the controller) did not match size.

Unless you’re performing a vendor-unique identify command, You’ll probably want to use one of the identify helpers (nvme_mi_admin_identify, nvme_mi_admin_identify_cns_nsid, or nvme_mi_admin_identify_<type>) instead of this. If the type of your identify command is standardized but not yet supported by libnvme-mi, please contact the maintainers.

See: struct nvme_identify_args

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_mi_admin_identify(nvme_mi_ctrl_t ctrl, struct nvme_identify_args *args)¶: Perform an Admin identify command.

Parameters

nvme_mi_ctrl_t ctrl: Controller to process identify command
struct nvme_identify_args *args: Identify command arguments

Description

Perform an Identify command, using the Identify command parameters in args. Stores the identify data in ->data, and (if set) the result from cdw0 into args->result.

Will return an error if the length of the response data (from the controller) is not a full NVME_IDENTIFY_DATA_SIZE.

See: struct nvme_identify_args

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_mi_admin_identify_cns_nsid(nvme_mi_ctrl_t ctrl, enum nvme_identify_cns cns, __u32 nsid, void *data)¶: Perform an Admin identify command using specific CNS/NSID parameters.

Parameters

nvme_mi_ctrl_t ctrl: Controller to process identify command
enum nvme_identify_cns cns: Controller or Namespace Structure, specifying identified object
__u32 nsid: namespace ID
void *data: buffer for identify data response

Description

Perform an Identify command, using the CNS specifier cns, and the namespace ID nsid if required by the CNS type.

Stores the identify data in data, which is expected to be a buffer of NVME_IDENTIFY_DATA_SIZE bytes.

Will return an error if the length of the response data (from the controller) is not a full NVME_IDENTIFY_DATA_SIZE.

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_mi_admin_identify_ns(nvme_mi_ctrl_t ctrl, __u32 nsid, struct nvme_id_ns *ns)¶: Perform an Admin identify command for a namespace

Parameters

nvme_mi_ctrl_t ctrl: Controller to process identify command
__u32 nsid: namespace ID
struct nvme_id_ns *ns: Namespace identification to populate

Description

Perform an Identify (namespace) command, setting the namespace id data in ns. The namespace is expected to active and allocated.

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_mi_admin_identify_ns_descs(nvme_mi_ctrl_t ctrl, __u32 nsid, struct nvme_ns_id_desc *descs)¶: Perform an Admin identify Namespace Identification Descriptor list command for a namespace

Parameters

nvme_mi_ctrl_t ctrl: Controller to process identify command
__u32 nsid: Namespace ID
struct nvme_ns_id_desc *descs: Namespace Identification Descriptor list to populate

Description

Perform an Identify namespace identification description list command, setting the namespace identification description list in descs

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_mi_admin_identify_allocated_ns(nvme_mi_ctrl_t ctrl, __u32 nsid, struct nvme_id_ns *ns)¶: Perform an Admin identify command for an allocated namespace

Parameters

nvme_mi_ctrl_t ctrl: Controller to process identify command
__u32 nsid: namespace ID
struct nvme_id_ns *ns: Namespace identification to populate

Description

Perform an Identify (namespace) command, setting the namespace id data in ns.

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_mi_admin_identify_ctrl(nvme_mi_ctrl_t ctrl, struct nvme_id_ctrl *id)¶: Perform an Admin identify for a controller

Parameters

nvme_mi_ctrl_t ctrl: Controller to process identify command
struct nvme_id_ctrl *id: Controller identify data to populate

Description

Perform an Identify command, for the controller specified by ctrl, writing identify data to id.

Will return an error if the length of the response data (from the controller) is not a full NVME_IDENTIFY_DATA_SIZE, so id will be fully populated on success.

See: struct nvme_id_ctrl

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_mi_admin_identify_ctrl_list(nvme_mi_ctrl_t ctrl, __u16 cntid, struct nvme_ctrl_list *list)¶: Perform an Admin identify for a controller list.

Parameters

nvme_mi_ctrl_t ctrl: Controller to process identify command
__u16 cntid: Controller ID to specify list start
struct nvme_ctrl_list *list: List data to populate

Description

Perform an Identify command, for the controller list starting with IDs greater than or equal to cntid.

Will return an error if the length of the response data (from the controller) is not a full NVME_IDENTIFY_DATA_SIZE, so id will be fully populated on success.

See: struct nvme_ctrl_list

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_mi_admin_identify_nsid_ctrl_list(nvme_mi_ctrl_t ctrl, __u32 nsid, __u16 cntid, struct nvme_ctrl_list *list)¶: Perform an Admin identify for a controller list with specific namespace ID

Parameters

nvme_mi_ctrl_t ctrl: Controller to process identify command
__u32 nsid: Namespace identifier
__u16 cntid: Controller ID to specify list start
struct nvme_ctrl_list *list: List data to populate

Description

Perform an Identify command, for the controller list for nsid, starting with IDs greater than or equal to cntid.

Will return an error if the length of the response data (from the controller) is not a full NVME_IDENTIFY_DATA_SIZE, so id will be fully populated on success.

See: struct nvme_ctrl_list

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_mi_admin_identify_allocated_ns_list(nvme_mi_ctrl_t ctrl, __u32 nsid, struct nvme_ns_list *list)¶: Perform an Admin identify for an allocated namespace list

Parameters

nvme_mi_ctrl_t ctrl: Controller to process identify command
__u32 nsid: Namespace ID to specify list start
struct nvme_ns_list *list: List data to populate

Description

Perform an Identify command, for the allocated namespace list starting with IDs greater than or equal to nsid. Specify NVME_NSID_NONE for the start of the list.

Will return an error if the length of the response data (from the controller) is not a full NVME_IDENTIFY_DATA_SIZE, so list will be be fully populated on success.

See: struct nvme_ns_list

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_mi_admin_identify_active_ns_list(nvme_mi_ctrl_t ctrl, __u32 nsid, struct nvme_ns_list *list)¶: Perform an Admin identify for an active namespace list

Parameters

nvme_mi_ctrl_t ctrl: Controller to process identify command
__u32 nsid: Namespace ID to specify list start
struct nvme_ns_list *list: List data to populate

Description

Perform an Identify command, for the active namespace list starting with IDs greater than or equal to nsid. Specify NVME_NSID_NONE for the start of the list.

Will return an error if the length of the response data (from the controller) is not a full NVME_IDENTIFY_DATA_SIZE, so list will be be fully populated on success.

See: struct nvme_ns_list

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_mi_admin_identify_primary_ctrl(nvme_mi_ctrl_t ctrl, __u16 cntid, struct nvme_primary_ctrl_cap *cap)¶: Perform an Admin identify for primary controller capabilities data structure.

Parameters

nvme_mi_ctrl_t ctrl: Controller to process identify command
__u16 cntid: Controller ID to specify
struct nvme_primary_ctrl_cap *cap: Primary Controller Capabilities data structure to populate

Description

Perform an Identify command to get the Primary Controller Capabilities data for the controller specified by cntid

Will return an error if the length of the response data (from the controller) is not a full NVME_IDENTIFY_DATA_SIZE, so cap will be be fully populated on success.

See: struct nvme_primary_ctrl_cap

Return

0 on success, non-zero on failure

int nvme_mi_admin_identify_secondary_ctrl_list(nvme_mi_ctrl_t ctrl, __u32 nsid, __u16 cntid, struct nvme_secondary_ctrl_list *list)¶: Perform an Admin identify for a secondary controller list.

Parameters

nvme_mi_ctrl_t ctrl: Controller to process identify command
__u32 nsid: Namespace ID to specify list start
__u16 cntid: Controller ID to specify list start
struct nvme_secondary_ctrl_list *list: List data to populate

Description

Perform an Identify command, for the secondary controllers associated with the current primary controller. Only entries with IDs greater than or equal to cntid are returned.

Will return an error if the length of the response data (from the controller) is not a full NVME_IDENTIFY_DATA_SIZE, so list will be be fully populated on success.

See: struct nvme_secondary_ctrl_list

Return

0 on success, non-zero on failure

int nvme_mi_admin_get_log(nvme_mi_ctrl_t ctrl, struct nvme_get_log_args *args)¶: Retrieve log page data from controller

Parameters

nvme_mi_ctrl_t ctrl: Controller to query
struct nvme_get_log_args *args: Get Log Page command arguments

Description

Performs a Get Log Page Admin command as specified by args. Response data is stored in args->data, which should be a buffer of args->data_len bytes. Resulting data length is stored in args->data_len on successful command completion.

This request may be implemented as multiple log page commands, in order to fit within MI message-size limits.

See: struct nvme_get_log_args

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_mi_admin_get_nsid_log(nvme_mi_ctrl_t ctrl, bool rae, enum nvme_cmd_get_log_lid lid, __u32 nsid, __u32 len, void *log)¶: Helper for Get Log Page functions

Parameters

nvme_mi_ctrl_t ctrl: Controller to query
bool rae: Retain Asynchronous Events
enum nvme_cmd_get_log_lid lid: Log identifier
__u32 nsid: Namespace ID
__u32 len: length of log buffer
void *log: pointer for resulting log data

Description

Performs a Get Log Page Admin command for a specific log ID lid and namespace ID nsid. Log data is expected to be len bytes, and is stored in log on success. The rae flag is passed as-is to the Get Log Page command, and is specific to the Log Page requested.

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_mi_admin_get_log_simple(nvme_mi_ctrl_t ctrl, enum nvme_cmd_get_log_lid lid, __u32 len, void *log)¶: Helper for Get Log Page functions with no NSID or RAE requirements

Parameters

nvme_mi_ctrl_t ctrl: Controller to query
enum nvme_cmd_get_log_lid lid: Log identifier
__u32 len: length of log buffer
void *log: pointer for resulting log data

Description

Performs a Get Log Page Admin command for a specific log ID lid, using NVME_NSID_ALL for the namespace identifier, and rae set to false.

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_mi_admin_get_log_supported_log_pages(nvme_mi_ctrl_t ctrl, bool rae, struct nvme_supported_log_pages *log)¶: Retrieve nmve supported log pages

Parameters

nvme_mi_ctrl_t ctrl: Controller to query
bool rae: Retain asynchronous events
struct nvme_supported_log_pages *log: Array of LID supported and Effects data structures

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_mi_admin_get_log_error(nvme_mi_ctrl_t ctrl, unsigned int nr_entries, bool rae, struct nvme_error_log_page *err_log)¶: Retrieve nvme error log

Parameters

nvme_mi_ctrl_t ctrl: Controller to query
unsigned int nr_entries: Number of error log entries allocated
bool rae: Retain asynchronous events
struct nvme_error_log_page *err_log: Array of error logs of size ‘entries’

Description

This log page describes extended error information for a command that completed with error, or may report an error that is not specific to a particular command.

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_mi_admin_get_log_smart(nvme_mi_ctrl_t ctrl, __u32 nsid, bool rae, struct nvme_smart_log *smart_log)¶: Retrieve nvme smart log

Parameters

nvme_mi_ctrl_t ctrl: Controller to query
__u32 nsid: Optional namespace identifier
bool rae: Retain asynchronous events
struct nvme_smart_log *smart_log: User address to store the smart log

Description

This log page provides SMART and general health information. The information provided is over the life of the controller and is retained across power cycles. To request the controller log page, the namespace identifier specified is FFFFFFFFh. The controller may also support requesting the log page on a per namespace basis, as indicated by bit 0 of the LPA field in the Identify Controller data structure.

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_mi_admin_get_log_fw_slot(nvme_mi_ctrl_t ctrl, bool rae, struct nvme_firmware_slot *fw_log)¶: Retrieves the controller firmware log

Parameters

nvme_mi_ctrl_t ctrl: Controller to query
bool rae: Retain asynchronous events
struct nvme_firmware_slot *fw_log: User address to store the log page

Description

This log page describes the firmware revision stored in each firmware slot supported. The firmware revision is indicated as an ASCII string. The log page also indicates the active slot number.

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_mi_admin_get_log_changed_ns_list(nvme_mi_ctrl_t ctrl, bool rae, struct nvme_ns_list *ns_log)¶: Retrieve namespace changed list

Parameters

nvme_mi_ctrl_t ctrl: Controller to query
bool rae: Retain asynchronous events
struct nvme_ns_list *ns_log: User address to store the log page

Description

This log page describes namespaces attached to this controller that have changed since the last time the namespace was identified, been added, or deleted.

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_mi_admin_get_log_cmd_effects(nvme_mi_ctrl_t ctrl, enum nvme_csi csi, struct nvme_cmd_effects_log *effects_log)¶: Retrieve nvme command effects log

Parameters

nvme_mi_ctrl_t ctrl: Controller to query
enum nvme_csi csi: Command Set Identifier
struct nvme_cmd_effects_log *effects_log: User address to store the effects log

Description

This log page describes the commands that the controller supports and the effects of those commands on the state of the NVM subsystem.

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_mi_admin_get_log_device_self_test(nvme_mi_ctrl_t ctrl, struct nvme_self_test_log *log)¶: Retrieve the device self test log

Parameters

nvme_mi_ctrl_t ctrl: Controller to query
struct nvme_self_test_log *log: Userspace address of the log payload

Description

The log page indicates the status of an in progress self test and the percent complete of that operation, and the results of the previous 20 self-test operations.

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_mi_admin_get_log_create_telemetry_host(nvme_mi_ctrl_t ctrl, struct nvme_telemetry_log *log)¶: Create host telemetry log

Parameters

nvme_mi_ctrl_t ctrl: Controller to query
struct nvme_telemetry_log *log: Userspace address of the log payload

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_mi_admin_get_log_telemetry_host(nvme_mi_ctrl_t ctrl, __u64 offset, __u32 len, void *log)¶: Get Telemetry Host-Initiated log page

Parameters

nvme_mi_ctrl_t ctrl: Controller to query
__u64 offset: Offset into the telemetry data
__u32 len: Length of provided user buffer to hold the log data in bytes
void *log: User address for log page data

Description

Retrieves the Telemetry Host-Initiated log page at the requested offset using the previously existing capture.

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_mi_admin_get_log_telemetry_ctrl(nvme_mi_ctrl_t ctrl, bool rae, __u64 offset, __u32 len, void *log)¶: Get Telemetry Controller-Initiated log page

Parameters

nvme_mi_ctrl_t ctrl: Controller to query
bool rae: Retain asynchronous events
__u64 offset: Offset into the telemetry data
__u32 len: Length of provided user buffer to hold the log data in bytes
void *log: User address for log page data

Description

Retrieves the Telemetry Controller-Initiated log page at the requested offset using the previously existing capture.

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_mi_admin_get_log_endurance_group(nvme_mi_ctrl_t ctrl, __u16 endgid, struct nvme_endurance_group_log *log)¶: Get Endurance Group log

Parameters

nvme_mi_ctrl_t ctrl: Controller to query
__u16 endgid: Starting group identifier to return in the list
struct nvme_endurance_group_log *log: User address to store the endurance log

Description

This log page indicates if an Endurance Group Event has occurred for a particular Endurance Group. If an Endurance Group Event has occurred, the details of the particular event are included in the Endurance Group Information log page for that Endurance Group. An asynchronous event is generated when an entry for an Endurance Group is newly added to this log page.

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_mi_admin_get_log_predictable_lat_nvmset(nvme_mi_ctrl_t ctrl, __u16 nvmsetid, struct nvme_nvmset_predictable_lat_log *log)¶: Predictable Latency Per NVM Set

Parameters

nvme_mi_ctrl_t ctrl: Controller to query
__u16 nvmsetid: NVM set id
struct nvme_nvmset_predictable_lat_log *log: User address to store the predictable latency log

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_mi_admin_get_log_predictable_lat_event(nvme_mi_ctrl_t ctrl, bool rae, __u32 offset, __u32 len, void *log)¶: Retrieve Predictable Latency Event Aggregate Log Page

Parameters

nvme_mi_ctrl_t ctrl: Controller to query
bool rae: Retain asynchronous events
__u32 offset: Offset into the predictable latency event
__u32 len: Length of provided user buffer to hold the log data in bytes
void *log: User address for log page data

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_mi_admin_get_log_ana(nvme_mi_ctrl_t ctrl, enum nvme_log_ana_lsp lsp, bool rae, __u64 offset, __u32 len, void *log)¶: Retrieve Asymmetric Namespace Access log page

Parameters

nvme_mi_ctrl_t ctrl: Controller to query
enum nvme_log_ana_lsp lsp: Log specific, see enum nvme_get_log_ana_lsp
bool rae: Retain asynchronous events
__u64 offset: Offset to the start of the log page
__u32 len: The allocated length of the log page
void *log: User address to store the ana log

Description

This log consists of a header describing the log and descriptors containing the asymmetric namespace access information for ANA Groups that contain namespaces that are attached to the controller processing the command.

See struct nvme_ana_rsp_hdr for the definition of the returned structure.

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_mi_admin_get_log_ana_groups(nvme_mi_ctrl_t ctrl, bool rae, __u32 len, struct nvme_ana_group_desc *log)¶: Retrieve Asymmetric Namespace Access groups only log page

Parameters

nvme_mi_ctrl_t ctrl: Controller to query
bool rae: Retain asynchronous events
__u32 len: The allocated length of the log page
struct nvme_ana_group_desc *log: User address to store the ana group log

Description

See struct nvme_ana_group_desc for the definition of the returned structure.

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_mi_admin_get_log_lba_status(nvme_mi_ctrl_t ctrl, bool rae, __u64 offset, __u32 len, void *log)¶: Retrieve LBA Status

Parameters

nvme_mi_ctrl_t ctrl: Controller to query
bool rae: Retain asynchronous events
__u64 offset: Offset to the start of the log page
__u32 len: The allocated length of the log page
void *log: User address to store the log page

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_mi_admin_get_log_endurance_grp_evt(nvme_mi_ctrl_t ctrl, bool rae, __u32 offset, __u32 len, void *log)¶: Retrieve Rotational Media Information

Parameters

nvme_mi_ctrl_t ctrl: Controller to query
bool rae: Retain asynchronous events
__u32 offset: Offset to the start of the log page
__u32 len: The allocated length of the log page
void *log: User address to store the log page

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_mi_admin_get_log_fid_supported_effects(nvme_mi_ctrl_t ctrl, bool rae, struct nvme_fid_supported_effects_log *log)¶: Retrieve Feature Identifiers Supported and Effects

Parameters

nvme_mi_ctrl_t ctrl: Controller to query
bool rae: Retain asynchronous events
struct nvme_fid_supported_effects_log *log: FID Supported and Effects data structure

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_mi_admin_get_log_mi_cmd_supported_effects(nvme_mi_ctrl_t ctrl, bool rae, struct nvme_mi_cmd_supported_effects_log *log)¶: displays the MI Commands Supported by the controller

Parameters

nvme_mi_ctrl_t ctrl: Controller to query
bool rae: Retain asynchronous events
struct nvme_mi_cmd_supported_effects_log *log: MI Command Supported and Effects data structure

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_mi_admin_get_log_boot_partition(nvme_mi_ctrl_t ctrl, bool rae, __u8 lsp, __u32 len, struct nvme_boot_partition *part)¶: Retrieve Boot Partition

Parameters

nvme_mi_ctrl_t ctrl: Controller to query
bool rae: Retain asynchronous events
__u8 lsp: The log specified field of LID
__u32 len: The allocated size, minimum struct nvme_boot_partition
struct nvme_boot_partition *part: User address to store the log page

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_mi_admin_get_log_discovery(nvme_mi_ctrl_t ctrl, bool rae, __u32 offset, __u32 len, void *log)¶: Retrieve Discovery log page

Parameters

nvme_mi_ctrl_t ctrl: Controller to query
bool rae: Retain asynchronous events
__u32 offset: Offset of this log to retrieve
__u32 len: The allocated size for this portion of the log
void *log: User address to store the discovery log

Description

Supported only by fabrics discovery controllers, returning discovery records.

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_mi_admin_get_log_media_unit_stat(nvme_mi_ctrl_t ctrl, __u16 domid, struct nvme_media_unit_stat_log *mus)¶: Retrieve Media Unit Status

Parameters

nvme_mi_ctrl_t ctrl: Controller to query
__u16 domid: Domain Identifier selection, if supported
struct nvme_media_unit_stat_log *mus: User address to store the Media Unit statistics log

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_mi_admin_get_log_support_cap_config_list(nvme_mi_ctrl_t ctrl, __u16 domid, struct nvme_supported_cap_config_list_log *cap)¶: Retrieve Supported Capacity Configuration List

Parameters

nvme_mi_ctrl_t ctrl: Controller to query
__u16 domid: Domain Identifier selection, if supported
struct nvme_supported_cap_config_list_log *cap: User address to store supported capabilities config list

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_mi_admin_get_log_reservation(nvme_mi_ctrl_t ctrl, bool rae, struct nvme_resv_notification_log *log)¶: Retrieve Reservation Notification

Parameters

nvme_mi_ctrl_t ctrl: Controller to query
bool rae: Retain asynchronous events
struct nvme_resv_notification_log *log: User address to store the reservation log

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_mi_admin_get_log_sanitize(nvme_mi_ctrl_t ctrl, bool rae, struct nvme_sanitize_log_page *log)¶: Retrieve Sanitize Status

Parameters

nvme_mi_ctrl_t ctrl: Controller to query
bool rae: Retain asynchronous events
struct nvme_sanitize_log_page *log: User address to store the sanitize log

Description

The Sanitize Status log page reports sanitize operation time estimates and information about the most recent sanitize operation.

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_mi_admin_get_log_zns_changed_zones(nvme_mi_ctrl_t ctrl, __u32 nsid, bool rae, struct nvme_zns_changed_zone_log *log)¶: Retrieve list of zones that have changed

Parameters

nvme_mi_ctrl_t ctrl: Controller to query
__u32 nsid: Namespace ID
bool rae: Retain asynchronous events
struct nvme_zns_changed_zone_log *log: User address to store the changed zone log

Description

The list of zones that have changed state due to an exceptional event.

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_mi_admin_get_log_persistent_event(nvme_mi_ctrl_t ctrl, enum nvme_pevent_log_action action, __u32 size, void *pevent_log)¶: Retrieve Persistent Event Log

Parameters

nvme_mi_ctrl_t ctrl: Controller to query
enum nvme_pevent_log_action action: Action the controller should take during processing this command
__u32 size: Size of pevent_log
void *pevent_log: User address to store the persistent event log

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_mi_admin_security_send(nvme_mi_ctrl_t ctrl, struct nvme_security_send_args *args)¶: Perform a Security Send command on a controller.

Parameters

nvme_mi_ctrl_t ctrl: Controller to send command to
struct nvme_security_send_args *args: Security Send command arguments

Description

Performs a Security Send Admin command as specified by args. Response data is stored in args->data, which should be a buffer of args->data_len bytes. Resulting data length is stored in args->data_len on successful command completion.

Security Send data length should not be greater than 4096 bytes to comply with specification limits.

See: struct nvme_get_log_args

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_mi_admin_security_recv(nvme_mi_ctrl_t ctrl, struct nvme_security_receive_args *args)¶: Perform a Security Receive command on a controller.

Parameters

nvme_mi_ctrl_t ctrl: Controller to send command to
struct nvme_security_receive_args *args: Security Receive command arguments

Description

Performs a Security Receive Admin command as specified by args. Response data is stored in args->data, which should be a buffer of args->data_len bytes. Resulting data length is stored in args->data_len on successful command completion.

Security Receive data length should not be greater than 4096 bytes to comply with specification limits.

See: struct nvme_get_log_args

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_mi_admin_get_features(nvme_mi_ctrl_t ctrl, struct nvme_get_features_args *args)¶: Perform a Get Feature command on a controller

Parameters

nvme_mi_ctrl_t ctrl: Controller to send command to
struct nvme_get_features_args *args: Get Features command arguments

Description

Performs a Get Features Admin command as specified by args. Returned feature data will be stored in args->result and args->data, depending on the specification of the feature itself; most features do not return additional data. See section 5.27.1 of the NVMe spec (v2.0b) for feature-specific information.

On success, args->data_len will be updated with the actual data length received.

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_mi_admin_get_features_data(nvme_mi_ctrl_t ctrl, enum nvme_features_id fid, __u32 nsid, __u32 data_len, void *data, __u32 *result)¶: Helper function for :c:type:`nvme_mi_admin_get_features`()

Parameters

nvme_mi_ctrl_t ctrl: Controller to send command to
enum nvme_features_id fid: Feature identifier
__u32 nsid: Namespace ID, if applicable for fid
__u32 data_len: Length of feature data, if applicable for fid, in bytes
void *data: User address of feature data, if applicable
__u32 *result: The command completion result from CQE dword0

Description

Helper for optionally features that optionally return data, using the SEL_CURRENT selector value.

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_mi_admin_get_features_simple(nvme_mi_ctrl_t ctrl, enum nvme_features_id fid, __u32 nsid, __u32 *result)¶: Get a simple feature value with no data

Parameters

nvme_mi_ctrl_t ctrl: Controller to send command to
enum nvme_features_id fid: Feature identifier
__u32 nsid: Namespace id, if required by fid
__u32 *result: output feature data

int nvme_mi_admin_set_features(nvme_mi_ctrl_t ctrl, struct nvme_set_features_args *args)¶: Perform a Set Features command on a controller

Parameters

nvme_mi_ctrl_t ctrl: Controller to send command to
struct nvme_set_features_args *args: Set Features command arguments

Description

Performs a Set Features Admin command as specified by args. Result data will be stored in args->result. on the specification of the feature itself; most features do not return additional data. See section 5.27.1 of the NVMe spec (v2.0b) for feature-specific information.

On success, args->data_len will be updated with the actual data length received.

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_mi_admin_ns_mgmt(nvme_mi_ctrl_t ctrl, struct nvme_ns_mgmt_args *args)¶: Issue a Namespace Management command

Parameters

nvme_mi_ctrl_t ctrl: Controller to send command to
struct nvme_ns_mgmt_args *args: Namespace management command arguments

Description

Issues a Namespace Management command to ctrl, with arguments specified from args.

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_mi_admin_ns_mgmt_create(nvme_mi_ctrl_t ctrl, struct nvme_id_ns *ns, __u8 csi, __u32 *nsid)¶: Helper for Namespace Management Create command

Parameters

nvme_mi_ctrl_t ctrl: Controller to send command to
struct nvme_id_ns *ns: New namespace parameters
__u8 csi: Command Set Identifier for new NS
__u32 *nsid: Set to new namespace ID on create

Description

Issues a Namespace Management (Create) command to ctrl, to create a new namespace specified by ns, using command set csi. On success, the new namespace ID will be written to nsid.

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_mi_admin_ns_mgmt_delete(nvme_mi_ctrl_t ctrl, __u32 nsid)¶: Helper for Namespace Management Delete command

Parameters

nvme_mi_ctrl_t ctrl: Controller to send command to
__u32 nsid: Namespace ID to delete

Description

Issues a Namespace Management (Delete) command to ctrl, to delete the namespace with id nsid.

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_mi_admin_ns_attach(nvme_mi_ctrl_t ctrl, struct nvme_ns_attach_args *args)¶: Attach or detach namespace to controller(s)

Parameters

nvme_mi_ctrl_t ctrl: Controller to send command to
struct nvme_ns_attach_args *args: Namespace Attach command arguments

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_mi_admin_ns_attach_ctrls(nvme_mi_ctrl_t ctrl, __u32 nsid, struct nvme_ctrl_list *ctrlist)¶: Attach namespace to controllers

Parameters

nvme_mi_ctrl_t ctrl: Controller to send command to
__u32 nsid: Namespace ID to attach
struct nvme_ctrl_list *ctrlist: Controller list to modify attachment state of nsid

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_mi_admin_ns_detach_ctrls(nvme_mi_ctrl_t ctrl, __u32 nsid, struct nvme_ctrl_list *ctrlist)¶: Detach namespace from controllers

Parameters

nvme_mi_ctrl_t ctrl: Controller to send command to
__u32 nsid: Namespace ID to detach
struct nvme_ctrl_list *ctrlist: Controller list to modify attachment state of nsid

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_mi_admin_fw_download(nvme_mi_ctrl_t ctrl, struct nvme_fw_download_args *args)¶: Download part or all of a firmware image to the controller

Parameters

nvme_mi_ctrl_t ctrl: Controller to send firmware data to
struct nvme_fw_download_args *args: struct nvme_fw_download_args argument structure

Description

The Firmware Image Download command downloads all or a portion of an image for a future update to the controller. The Firmware Image Download command downloads a new image (in whole or in part) to the controller.

The image may be constructed of multiple pieces that are individually downloaded with separate Firmware Image Download commands. Each Firmware Image Download command includes a Dword Offset and Number of Dwords that specify a dword range.

The new firmware image is not activated as part of the Firmware Image Download command. Use the nvme_mi_admin_fw_commit() to activate a newly downloaded image.

Return

0 on success, non-zero on failure

int nvme_mi_admin_fw_commit(nvme_mi_ctrl_t ctrl, struct nvme_fw_commit_args *args)¶: Commit firmware using the specified action

Parameters

nvme_mi_ctrl_t ctrl: Controller to send firmware data to
struct nvme_fw_commit_args *args: struct nvme_fw_download_args argument structure

Description

The Firmware Commit command modifies the firmware image or Boot Partitions.

Return

0 on success, non-zero on failure

int nvme_mi_admin_format_nvm(nvme_mi_ctrl_t ctrl, struct nvme_format_nvm_args *args)¶: Format NVMe namespace

Parameters

nvme_mi_ctrl_t ctrl: Controller to send command to
struct nvme_format_nvm_args *args: Format NVM command arguments

Description

Perform a low-level format to set the LBA data & metadata size. May destroy data & metadata on the specified namespaces

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

int nvme_mi_admin_sanitize_nvm(nvme_mi_ctrl_t ctrl, struct nvme_sanitize_nvm_args *args)¶: Start a subsystem Sanitize operation

Parameters

nvme_mi_ctrl_t ctrl: Controller to send command to
struct nvme_sanitize_nvm_args *args: Sanitize command arguments

Description

A sanitize operation alters all user data in the NVM subsystem such that recovery of any previous user data from any cache, the non-volatile media, or any Controller Memory Buffer is not possible.

The Sanitize command starts a sanitize operation or to recover from a previously failed sanitize operation. The sanitize operation types that may be supported are Block Erase, Crypto Erase, and Overwrite. All sanitize operations are processed in the background, i.e., completion of the sanitize command does not indicate completion of the sanitize operation.

Return

The nvme command status if a response was received (see enum nvme_status_field) or -1 with errno set otherwise.

tree.h

libnvme tree object interface

nvme_root_t nvme_create_root(FILE *fp, int log_level)¶: Initialize root object

Parameters

FILE *fp: File descriptor for logging messages
int log_level: Logging level to use

Return

Initialized nvme_root_t object

void nvme_free_tree(nvme_root_t r)¶: Free root object

Parameters

nvme_root_t r: nvme_root_t object

Description

Free an nvme_root_t object and all attached objects

nvme_host_t nvme_first_host(nvme_root_t r)¶: Start host iterator

Parameters

nvme_root_t r: nvme_root_t object

Return

First nvme_host_t object in an iterator

nvme_host_t nvme_next_host(nvme_root_t r, nvme_host_t h)¶: Next host iterator

Parameters

nvme_root_t r: nvme_root_t object
nvme_host_t h: Previous nvme_host_t iterator

Return

Next nvme_host_t object in an iterator

nvme_root_t nvme_host_get_root(nvme_host_t h)¶: Returns nvme_root_t object

Parameters

nvme_host_t h: nvme_host_t object

Return

nvme_root_t object from h

nvme_host_t nvme_lookup_host(nvme_root_t r, const char *hostnqn, const char *hostid)¶: Lookup nvme_host_t object

Parameters

nvme_root_t r: nvme_root_t object
const char *hostnqn: Host NQN
const char *hostid: Host ID

Description

Lookup a nvme_host_t object based on hostnqn and hostid or create one if not found.

Return

nvme_host_t object

const char *nvme_host_get_dhchap_key(nvme_host_t h)¶: Return host key

Parameters

nvme_host_t h: Host for which the key should be returned

Return

DH-HMAC-CHAP host key or NULL if not set

void nvme_host_set_dhchap_key(nvme_host_t h, const char *key)¶: set host key

Parameters

nvme_host_t h: Host for which the key should be set
const char *key: DH-HMAC-CHAP Key to set or NULL to clear existing key

nvme_host_t nvme_default_host(nvme_root_t r)¶: Initializes the default host

Parameters

nvme_root_t r: nvme_root_t object

Description

Initializes the default host object based on the values in /etc/nvme/hostnqn and /etc/nvme/hostid and attaches it to r.

Return

nvme_host_t object

nvme_subsystem_t nvme_first_subsystem(nvme_host_t h)¶: Start subsystem iterator

Parameters

nvme_host_t h: nvme_host_t object

Return

first nvme_subsystem_t object in an iterator

nvme_subsystem_t nvme_next_subsystem(nvme_host_t h, nvme_subsystem_t s)¶: Next subsystem iterator

Parameters

nvme_host_t h: nvme_host_t object
nvme_subsystem_t s: Previous nvme_subsystem_t iterator

Return

next nvme_subsystem_t object in an iterator

nvme_subsystem_t nvme_lookup_subsystem(struct nvme_host *h, const char *name, const char *subsysnqn)¶: Lookup nvme_subsystem_t object

Parameters

struct nvme_host *h: nvme_host_t object
const char *name: Name of the subsystem (may be NULL)
const char *subsysnqn: Subsystem NQN

Description

Lookup a nvme_subsystem_t object in h base on name (if present) and subsysnqn or create one if not found.

Return

nvme_subsystem_t object

void nvme_free_subsystem(struct nvme_subsystem *s)¶: Free a subsystem

Parameters

struct nvme_subsystem *s: subsystem

Description

Frees s and all related objects.

nvme_host_t nvme_subsystem_get_host(nvme_subsystem_t s)¶: Returns nvme_host_t object

Parameters

nvme_subsystem_t s: subsystem

Return

nvme_host_t object from s

nvme_ns_t nvme_ctrl_first_ns(nvme_ctrl_t c)¶: Start namespace iterator

Parameters

nvme_ctrl_t c: Controller instance

Return

First nvme_ns_t object of an c iterator

nvme_ns_t nvme_ctrl_next_ns(nvme_ctrl_t c, nvme_ns_t n)¶: Next namespace iterator

Parameters

nvme_ctrl_t c: Controller instance
nvme_ns_t n: Previous nvme_ns_t iterator

Return

Next nvme_ns_t object of an c iterator

nvme_path_t nvme_ctrl_first_path(nvme_ctrl_t c)¶: Start path iterator

Parameters

nvme_ctrl_t c: Controller instance

Return

First nvme_path_t object of an c iterator

nvme_path_t nvme_ctrl_next_path(nvme_ctrl_t c, nvme_path_t p)¶: Next path iterator

Parameters

nvme_ctrl_t c: Controller instance
nvme_path_t p: Previous nvme_path_t object of an c iterator

Return

Next nvme_path_t object of an c iterator

nvme_ctrl_t nvme_subsystem_first_ctrl(nvme_subsystem_t s)¶: First ctrl iterator

Parameters

nvme_subsystem_t s: nvme_subsystem_t object

Return

First controller of an s iterator

nvme_ctrl_t nvme_subsystem_next_ctrl(nvme_subsystem_t s, nvme_ctrl_t c)¶: Next ctrl iterator

Parameters

nvme_subsystem_t s: nvme_subsystem_t object
nvme_ctrl_t c: Previous controller instance of an s iterator

Return

Next controller of an s iterator

nvme_path_t nvme_namespace_first_path(nvme_ns_t ns)¶: Start path iterator

Parameters

nvme_ns_t ns: Namespace instance

Return

First nvme_path_t object of an ns iterator

nvme_path_t nvme_namespace_next_path(nvme_ns_t ns, nvme_path_t p)¶: Next path iterator

Parameters

nvme_ns_t ns: Namespace instance
nvme_path_t p: Previous nvme_path_t object of an ns iterator

Return

Next nvme_path_t object of an ns iterator

nvme_ctrl_t nvme_lookup_ctrl(nvme_subsystem_t s, const char *transport, const char *traddr, const char *host_traddr, const char *host_iface, const char *trsvcid, nvme_ctrl_t p)¶: Lookup nvme_ctrl_t object

Parameters

nvme_subsystem_t s: nvme_subsystem_t object
const char *transport: Transport name
const char *traddr: Transport address
const char *host_traddr: Host transport address
const char *host_iface: Host interface name
const char *trsvcid: Transport service identifier
nvme_ctrl_t p: Previous controller instance

Description

Lookup a controller in s based on transport, traddr, host_traddr, host_iface, and trsvcid. transport must be specified, other fields may be required depending on the transport. A new object is created if none is found. If p is specified the lookup will start at p instead of the first controller.

Return

Controller instance

nvme_ctrl_t nvme_create_ctrl(nvme_root_t r, const char *subsysnqn, const char *transport, const char *traddr, const char *host_traddr, const char *host_iface, const char *trsvcid)¶: Allocate an unconnected NVMe controller

Parameters

nvme_root_t r: NVMe root element
const char *subsysnqn: Subsystem NQN
const char *transport: Transport type
const char *traddr: Transport address
const char *host_traddr: Host transport address
const char *host_iface: Host interface name
const char *trsvcid: Transport service ID

Description

Creates an unconnected controller to be used for nvme_add_ctrl().

Return

Controller instance

nvme_ns_t nvme_subsystem_first_ns(nvme_subsystem_t s)¶: Start namespace iterator

Parameters

nvme_subsystem_t s: nvme_subsystem_t object

Return

First nvme_ns_t object of an s iterator

nvme_ns_t nvme_subsystem_next_ns(nvme_subsystem_t s, nvme_ns_t n)¶: Next namespace iterator

Parameters

nvme_subsystem_t s: nvme_subsystem_t object
nvme_ns_t n: Previous nvme_ns_t iterator

Return

Next nvme_ns_t object of an s iterator

nvme_for_each_host_safe¶

nvme_for_each_host_safe (r, h, _h)

Traverse host list

Parameters

r: nvme_root_t object
h: nvme_host_t object
_h: Temporary nvme_host_t object

nvme_for_each_host¶

nvme_for_each_host (r, h)

Traverse host list

Parameters

r: nvme_root_t object
h: nvme_host_t object

nvme_for_each_subsystem_safe¶

nvme_for_each_subsystem_safe (h, s, _s)

Traverse subsystems

Parameters

h: nvme_host_t object
s: nvme_subsystem_t object
_s: Temporary nvme_subsystem_t object

nvme_for_each_subsystem¶

nvme_for_each_subsystem (h, s)

Traverse subsystems

Parameters

h: nvme_host_t object
s: nvme_subsystem_t object

nvme_subsystem_for_each_ctrl_safe¶

nvme_subsystem_for_each_ctrl_safe (s, c, _c)

Traverse controllers

Parameters

s: nvme_subsystem_t object
c: Controller instance
_c: A nvme_ctrl_t_node to use as temporary storage

nvme_subsystem_for_each_ctrl¶

nvme_subsystem_for_each_ctrl (s, c)

Traverse controllers

Parameters

s: nvme_subsystem_t object
c: Controller instance

nvme_ctrl_for_each_ns_safe¶

nvme_ctrl_for_each_ns_safe (c, n, _n)

Traverse namespaces

Parameters

c: Controller instance
n: nvme_ns_t object
_n: A nvme_ns_t_node to use as temporary storage

nvme_ctrl_for_each_ns¶

nvme_ctrl_for_each_ns (c, n)

Traverse namespaces

Parameters

c: Controller instance
n: nvme_ns_t object

nvme_ctrl_for_each_path_safe¶

nvme_ctrl_for_each_path_safe (c, p, _p)

Traverse paths

Parameters

c: Controller instance
p: nvme_path_t object
_p: A nvme_path_t_node to use as temporary storage

nvme_ctrl_for_each_path¶

nvme_ctrl_for_each_path (c, p)

Traverse paths

Parameters

c: Controller instance
p: nvme_path_t object

nvme_subsystem_for_each_ns_safe¶

nvme_subsystem_for_each_ns_safe (s, n, _n)

Traverse namespaces

Parameters

s: nvme_subsystem_t object
n: nvme_ns_t object
_n: A nvme_ns_t_node to use as temporary storage

nvme_subsystem_for_each_ns¶

nvme_subsystem_for_each_ns (s, n)

Traverse namespaces

Parameters

s: nvme_subsystem_t object
n: nvme_ns_t object

nvme_namespace_for_each_path_safe¶

nvme_namespace_for_each_path_safe (n, p, _p)

Traverse paths

Parameters

n: Namespace instance
p: nvme_path_t object
_p: A nvme_path_t_node to use as temporary storage

nvme_namespace_for_each_path¶

nvme_namespace_for_each_path (n, p)

Traverse paths

Parameters

n: Namespace instance
p: nvme_path_t object

int nvme_ns_get_fd(nvme_ns_t n)¶: Get associated file descriptor

Parameters

nvme_ns_t n: Namespace instance

Return

File descriptor associated with n or -1

int nvme_ns_get_nsid(nvme_ns_t n)¶: NSID of a namespace

Parameters

nvme_ns_t n: Namespace instance

Return

NSID of n

int nvme_ns_get_lba_size(nvme_ns_t n)¶: LBA size of a namespace

Parameters

nvme_ns_t n: Namespace instance

Return

LBA size of n

int nvme_ns_get_meta_size(nvme_ns_t n)¶: Metadata size of a namespace

Parameters

nvme_ns_t n: Namespace instance

Return

Metadata size of n

uint64_t nvme_ns_get_lba_count(nvme_ns_t n)¶: LBA count of a namespace

Parameters

nvme_ns_t n: Namespace instance

Return

LBA count of n

uint64_t nvme_ns_get_lba_util(nvme_ns_t n)¶: LBA utilization of a namespace

Parameters

nvme_ns_t n: Namespace instance

Return

LBA utilization of n

enum nvme_csi nvme_ns_get_csi(nvme_ns_t n)¶: Command set identifier of a namespace

Parameters

nvme_ns_t n: Namespace instance

Return

The namespace’s command set identifier in use

const uint8_t *nvme_ns_get_eui64(nvme_ns_t n)¶: 64-bit eui of a namespace

Parameters

nvme_ns_t n: Namespace instance

Return

A pointer to the 64-bit eui

const uint8_t *nvme_ns_get_nguid(nvme_ns_t n)¶: 128-bit nguid of a namespace

Parameters

nvme_ns_t n: Namespace instance

Return

A pointer to the 128-bit nguid

void nvme_ns_get_uuid(nvme_ns_t n, unsigned char out[NVME_UUID_LEN])¶: UUID of a namespace

Parameters

nvme_ns_t n: Namespace instance
unsigned char out[NVME_UUID_LEN]: buffer for the UUID

Description

Copies the namespace’s uuid into out

const char *nvme_ns_get_sysfs_dir(nvme_ns_t n)¶: sysfs directory of a namespace

Parameters

nvme_ns_t n: Namespace instance

Return

sysfs directory name of n

const char *nvme_ns_get_name(nvme_ns_t n)¶: sysfs name of a namespace

Parameters

nvme_ns_t n: Namespace instance

Return

sysfs name of n

const char *nvme_ns_get_generic_name(nvme_ns_t n)¶: Returns name of generic namespace chardev.

Parameters

nvme_ns_t n: Namespace instance

Return

Name of generic namespace chardev

const char *nvme_ns_get_firmware(nvme_ns_t n)¶: Firmware string of a namespace

Parameters

nvme_ns_t n: Namespace instance

Return

Firmware string of n

const char *nvme_ns_get_serial(nvme_ns_t n)¶: Serial number of a namespace

Parameters

nvme_ns_t n: Namespace instance

Return

Serial number string of n

const char *nvme_ns_get_model(nvme_ns_t n)¶: Model of a namespace

Parameters

nvme_ns_t n: Namespace instance

Return

Model string of n

nvme_subsystem_t nvme_ns_get_subsystem(nvme_ns_t n)¶: nvme_subsystem_t of a namespace

Parameters

nvme_ns_t n: Namespace instance

Return

nvme_subsystem_t object of n

nvme_ctrl_t nvme_ns_get_ctrl(nvme_ns_t n)¶: nvme_ctrl_t of a namespace

Parameters

nvme_ns_t n: Namespace instance

Description

nvme_ctrl_t object may be NULL for a multipathed namespace

Return

nvme_ctrl_t object of n if present

void nvme_free_ns(struct nvme_ns *n)¶: Free a namespace object

Parameters

struct nvme_ns *n: Namespace instance

int nvme_ns_read(nvme_ns_t n, void *buf, off_t offset, size_t count)¶: Read from a namespace

Parameters

nvme_ns_t n: Namespace instance
void *buf: Buffer into which the data will be transferred
off_t offset: LBA offset of n
size_t count: Number of sectors in buf

Return

Number of sectors read or -1 on error.

int nvme_ns_write(nvme_ns_t n, void *buf, off_t offset, size_t count)¶: Write to a namespace

Parameters

nvme_ns_t n: Namespace instance
void *buf: Buffer with data to be written
off_t offset: LBA offset of n
size_t count: Number of sectors in buf

Return

Number of sectors written or -1 on error

int nvme_ns_verify(nvme_ns_t n, off_t offset, size_t count)¶: Verify data on a namespace

Parameters

nvme_ns_t n: Namespace instance
off_t offset: LBA offset of n
size_t count: Number of sectors to be verified

Return

Number of sectors verified

int nvme_ns_compare(nvme_ns_t n, void *buf, off_t offset, size_t count)¶: Compare data on a namespace

Parameters

nvme_ns_t n: Namespace instance
void *buf: Buffer with data to be compared
off_t offset: LBA offset of n
size_t count: Number of sectors in buf

Return

Number of sectors compared

int nvme_ns_write_zeros(nvme_ns_t n, off_t offset, size_t count)¶: Write zeros to a namespace

Parameters

nvme_ns_t n: Namespace instance
off_t offset: LBA offset in n
size_t count: Number of sectors to be written

Return

Number of sectors written

int nvme_ns_write_uncorrectable(nvme_ns_t n, off_t offset, size_t count)¶: Issus a ‘write uncorrectable’ command

Parameters

nvme_ns_t n: Namespace instance
off_t offset: LBA offset in n
size_t count: Number of sectors to be written

Return

Number of sectors written

int nvme_ns_flush(nvme_ns_t n)¶: Flush data to a namespace

Parameters

nvme_ns_t n: Namespace instance

Return

0 on success, -1 on error.

int nvme_ns_identify(nvme_ns_t n, struct nvme_id_ns *ns)¶: Issue an ‘identify namespace’ command

Parameters

nvme_ns_t n: Namespace instance
struct nvme_id_ns *ns: nvme_id_ns buffer

Description

Writes the data returned by the ‘identify namespace’ command into ns.

Return

0 on success, -1 on error.

int nvme_ns_identify_descs(nvme_ns_t n, struct nvme_ns_id_desc *descs)¶: Issue an ‘identify descriptors’ command

Parameters

nvme_ns_t n: Namespace instance
struct nvme_ns_id_desc *descs: List of identify descriptors

Description

Writes the data returned by the ‘identify descriptors’ command into descs.

Return

0 on success, -1 on error.

const char *nvme_path_get_name(nvme_path_t p)¶: sysfs name of an nvme_path_t object

Parameters

nvme_path_t p: nvme_path_t object

Return

sysfs name of p

const char *nvme_path_get_sysfs_dir(nvme_path_t p)¶: sysfs directory of an nvme_path_t object

Parameters

nvme_path_t p: nvme_path_t object

Return

sysfs directory of p

const char *nvme_path_get_ana_state(nvme_path_t p)¶: ANA state of an nvme_path_t object

Parameters

nvme_path_t p: nvme_path_t object

Return

ANA (Asynchronous Namespace Access) state of p

nvme_ctrl_t nvme_path_get_ctrl(nvme_path_t p)¶: Parent controller of an nvme_path_t object

Parameters

nvme_path_t p: nvme_path_t object

Return

Parent controller if present

nvme_ns_t nvme_path_get_ns(nvme_path_t p)¶: Parent namespace of an nvme_path_t object

Parameters

nvme_path_t p: nvme_path_t object

Return

Parent namespace if present

int nvme_ctrl_get_fd(nvme_ctrl_t c)¶: Get associated file descriptor

Parameters

nvme_ctrl_t c: Controller instance

Return

File descriptor associated with c or -1

const char *nvme_ctrl_get_name(nvme_ctrl_t c)¶: sysfs name of a controller

Parameters

nvme_ctrl_t c: Controller instance

Return

sysfs name of c

const char *nvme_ctrl_get_sysfs_dir(nvme_ctrl_t c)¶: sysfs directory of a controller

Parameters

nvme_ctrl_t c: Controller instance

Return

sysfs directory name of c

const char *nvme_ctrl_get_address(nvme_ctrl_t c)¶: Address string of a controller

Parameters

nvme_ctrl_t c: Controller instance

Return

NVMe-over-Fabrics address string of c or empty string of no address is present.

const char *nvme_ctrl_get_firmware(nvme_ctrl_t c)¶: Firmware string of a controller

Parameters

nvme_ctrl_t c: Controller instance

Return

Firmware string of c

const char *nvme_ctrl_get_model(nvme_ctrl_t c)¶: Model of a controller

Parameters

nvme_ctrl_t c: Controller instance

Return

Model string of c

const char *nvme_ctrl_get_state(nvme_ctrl_t c)¶: Running state of an controller

Parameters

nvme_ctrl_t c: Controller instance

Return

String indicating the running state of c

const char *nvme_ctrl_get_numa_node(nvme_ctrl_t c)¶: NUMA node of a controller

Parameters

nvme_ctrl_t c: Controller instance

Return

String indicating the NUMA node

const char *nvme_ctrl_get_queue_count(nvme_ctrl_t c)¶: Queue count of a controller

Parameters

nvme_ctrl_t c: Controller instance

Return

Queue count of c

const char *nvme_ctrl_get_serial(nvme_ctrl_t c)¶: Serial number of a controller

Parameters

nvme_ctrl_t c: Controller instance

Return

Serial number string of c

const char *nvme_ctrl_get_sqsize(nvme_ctrl_t c)¶: SQ size of a controller

Parameters

nvme_ctrl_t c: Controller instance

Return

SQ size (as string) of c

const char *nvme_ctrl_get_transport(nvme_ctrl_t c)¶: Transport type of a controller

Parameters

nvme_ctrl_t c: Controller instance

Return

Transport type of c

const char *nvme_ctrl_get_subsysnqn(nvme_ctrl_t c)¶: Subsystem NQN of a controller

Parameters

nvme_ctrl_t c: Controller instance

Return

Subsystem NQN of c

nvme_subsystem_t nvme_ctrl_get_subsystem(nvme_ctrl_t c)¶: Parent subsystem of a controller

Parameters

nvme_ctrl_t c: Controller instance

Return

Parent nvme_subsystem_t object

const char *nvme_ctrl_get_traddr(nvme_ctrl_t c)¶: Transport address of a controller

Parameters

nvme_ctrl_t c: Controller instance

Return

Transport address of c

const char *nvme_ctrl_get_trsvcid(nvme_ctrl_t c)¶: Transport service identifier of a controller

Parameters

nvme_ctrl_t c: Controller instance

Return

Transport service identifier of c (if present)

const char *nvme_ctrl_get_host_traddr(nvme_ctrl_t c)¶: Host transport address of a controller

Parameters

nvme_ctrl_t c: Controller instance

Return

Host transport address of c (if present)

const char *nvme_ctrl_get_host_iface(nvme_ctrl_t c)¶: Host interface name of a controller

Parameters

nvme_ctrl_t c: Controller instance

Return

Host interface name of c (if present)

const char *nvme_ctrl_get_dhchap_host_key(nvme_ctrl_t c)¶: Return host key

Parameters

nvme_ctrl_t c: Controller to be checked

Return

DH-HMAC-CHAP host key or NULL if not set

void nvme_ctrl_set_dhchap_host_key(nvme_ctrl_t c, const char *key)¶: Set host key

Parameters

nvme_ctrl_t c: Host for which the key should be set
const char *key: DH-HMAC-CHAP Key to set or NULL to clear existing key

const char *nvme_ctrl_get_dhchap_key(nvme_ctrl_t c)¶: Return controller key

Parameters

nvme_ctrl_t c: Controller for which the key should be set

Return

DH-HMAC-CHAP controller key or NULL if not set

void nvme_ctrl_set_dhchap_key(nvme_ctrl_t c, const char *key)¶: Set controller key

Parameters

nvme_ctrl_t c: Controller for which the key should be set
const char *key: DH-HMAC-CHAP Key to set or NULL to clear existing key

struct nvme_fabrics_config *nvme_ctrl_get_config(nvme_ctrl_t c)¶: Fabrics configuration of a controller

Parameters

nvme_ctrl_t c: Controller instance

Return

Fabrics configuration of c

void nvme_ctrl_set_discovered(nvme_ctrl_t c, bool discovered)¶: Set the ‘discovered’ flag

Parameters

nvme_ctrl_t c: nvme_ctrl_t object
bool discovered: Value of the ‘discovered’ flag

Description

Set the ‘discovered’ flag of c to discovered

bool nvme_ctrl_is_discovered(nvme_ctrl_t c)¶: Returns the value of the ‘discovered’ flag

Parameters

nvme_ctrl_t c: Controller instance

Return

Value of the ‘discovered’ flag of c

void nvme_ctrl_set_persistent(nvme_ctrl_t c, bool persistent)¶: Set the ‘persistent’ flag

Parameters

nvme_ctrl_t c: Controller instance
bool persistent: value of the ‘persistent’ flag

Description

Set the ‘persistent’ flag of c to persistent

bool nvme_ctrl_is_persistent(nvme_ctrl_t c)¶: Returns the value of the ‘persistent’ flag

Parameters

nvme_ctrl_t c: Controller instance

Return

Value of the ‘persistent’ flag of c

void nvme_ctrl_set_discovery_ctrl(nvme_ctrl_t c, bool discovery)¶: Set the ‘discovery_ctrl’ flag

Parameters

nvme_ctrl_t c: Controller to be modified
bool discovery: value of the discovery_ctrl flag

Description

Sets the ‘discovery_ctrl’ flag in c to specify whether c connects to a discovery subsystem.

bool nvme_ctrl_is_discovery_ctrl(nvme_ctrl_t c)¶: Check the ‘discovery_ctrl’ flag

Parameters

nvme_ctrl_t c: Controller to be checked

Description

Returns the value of the ‘discovery_ctrl’ flag which specifies whether c connects to a discovery subsystem.

Return

Value of the ‘discover_ctrl’ flag

int nvme_ctrl_identify(nvme_ctrl_t c, struct nvme_id_ctrl *id)¶: Issues an ‘identify controller’ command

Parameters

nvme_ctrl_t c: Controller instance
struct nvme_id_ctrl *id: Identify controller data structure

Description

Issues an ‘identify controller’ command to c and copies the data into id.

Return

0 on success or -1 on failure.

int nvme_disconnect_ctrl(nvme_ctrl_t c)¶: Disconnect a controller

Parameters

nvme_ctrl_t c: Controller instance

Description

Issues a ‘disconnect’ fabrics command to c

Return

0 on success, -1 on failure.

nvme_ctrl_t nvme_scan_ctrl(nvme_root_t r, const char *name)¶: Scan on a controller

Parameters

nvme_root_t r: nvme_root_t object
const char *name: Name of the controller

Description

Scans a controller with sysfs name name and add it to r.

Return

nvme_ctrl_t object

void nvme_rescan_ctrl(nvme_ctrl_t c)¶: Rescan an existing controller

Parameters

nvme_ctrl_t c: Controller instance

int nvme_init_ctrl(nvme_host_t h, nvme_ctrl_t c, int instance)¶: Initialize nvme_ctrl_t object for an existing controller.

Parameters

nvme_host_t h: nvme_host_t object
nvme_ctrl_t c: nvme_ctrl_t object
int instance: Instance number (e.g. 1 for nvme1)

Return

The ioctl() return code. Typically 0 on success.

void nvme_free_ctrl(struct nvme_ctrl *c)¶: Free controller

Parameters

struct nvme_ctrl *c: Controller instance

void nvme_unlink_ctrl(struct nvme_ctrl *c)¶: Unlink controller

Parameters

struct nvme_ctrl *c: Controller instance

const char *nvme_subsystem_get_nqn(nvme_subsystem_t s)¶: Retrieve NQN from subsystem

Parameters

nvme_subsystem_t s: nvme_subsystem_t object

Return

NQN of subsystem

const char *nvme_subsystem_get_sysfs_dir(nvme_subsystem_t s)¶: sysfs directory of an nvme_subsystem_t object

Parameters

nvme_subsystem_t s: nvme_subsystem_t object

Return

sysfs directory name of s

const char *nvme_subsystem_get_name(nvme_subsystem_t s)¶: sysfs name of an nvme_subsystem_t object

Parameters

nvme_subsystem_t s: nvme_subsystem_t object

Return

sysfs name of s

const char *nvme_subsystem_get_type(nvme_subsystem_t s)¶: Returns the type of a subsystem

Parameters

nvme_subsystem_t s: nvme_subsystem_t object

Description

Returns the subsystem type of s.

Return

‘nvm’ or ‘discovery’

int nvme_scan_topology(nvme_root_t r, nvme_scan_filter_t f, void *f_args)¶: Scan NVMe topology and apply filter

Parameters

nvme_root_t r: nvme_root_t object
nvme_scan_filter_t f: filter to apply
void *f_args: user-specified argument to f

Description

Scans the NVMe topology and filters out the resulting elements by applying f.

Return

Number of elements scanned

const char *nvme_host_get_hostnqn(nvme_host_t h)¶: Host NQN of an nvme_host_t object

Parameters

nvme_host_t h: nvme_host_t object

Return

Host NQN of h

const char *nvme_host_get_hostid(nvme_host_t h)¶: Host ID of an nvme_host_t object

Parameters

nvme_host_t h: nvme_host_t object

Return

Host ID of h

void nvme_free_host(nvme_host_t h)¶: Free nvme_host_t object

Parameters

nvme_host_t h: nvme_host_t object

nvme_root_t nvme_scan(const char *config_file)¶: Scan NVMe topology

Parameters

const char *config_file: Configuration file

Return

nvme_root_t object of found elements

int nvme_read_config(nvme_root_t r, const char *config_file)¶: Read NVMe JSON configuration file

Parameters

nvme_root_t r: nvme_root_t object
const char *config_file: JSON configuration file

Description

Read in the contents of config_file and merge them with the elements in r.

Return

0 on success, -1 on failure with errno set.

void nvme_refresh_topology(nvme_root_t r)¶: Refresh nvme_root_t object contents

Parameters

nvme_root_t r: nvme_root_t object

Description

Removes all elements in r and rescans the existing topology.

int nvme_update_config(nvme_root_t r)¶: Update JSON configuration

Parameters

nvme_root_t r: nvme_root_t object

Description

Updates the JSON configuration file with the contents of r.

Return

0 on success, -1 on failure.

int nvme_dump_config(nvme_root_t r)¶: Print the JSON configuration

Parameters

nvme_root_t r: nvme_root_t object

Description

Prints the current contents of the JSON configuration file to stdout.

Return

0 on success, -1 on failure.

int nvme_dump_tree(nvme_root_t r)¶: Dump internal object tree

Parameters

nvme_root_t r: nvme_root_t object

Description

Prints the internal object tree in JSON format to stdout.

Return

0 on success, -1 on failure.

char *nvme_get_attr(const char *d, const char *attr)¶: Read sysfs attribute

Parameters

const char *d: sysfs directory
const char *attr: sysfs attribute name

Return

String with the contents of attr or NULL in case of an empty value: or in case of an error (indicated by non-zero errno code).

char *nvme_get_subsys_attr(nvme_subsystem_t s, const char *attr)¶: Read subsystem sysfs attribute

Parameters

nvme_subsystem_t s: nvme_subsystem_t object
const char *attr: sysfs attribute name

Return

String with the contents of attr or NULL in case of an empty value: or in case of an error (indicated by non-zero errno code).

char *nvme_get_ctrl_attr(nvme_ctrl_t c, const char *attr)¶: Read controller sysfs attribute

Parameters

nvme_ctrl_t c: Controller instance
const char *attr: sysfs attribute name

Return

String with the contents of attr or NULL in case of an empty value: or in case of an error (indicated by non-zero errno code).

char *nvme_get_ns_attr(nvme_ns_t n, const char *attr)¶: Read namespace sysfs attribute

Parameters

nvme_ns_t n: nvme_ns_t object
const char *attr: sysfs attribute name

Return

String with the contents of attr or NULL in case of an empty value: or in case of an error (indicated by non-zero errno code).

nvme_ns_t nvme_subsystem_lookup_namespace(struct nvme_subsystem *s, __u32 nsid)¶: lookup namespace by NSID

Parameters

struct nvme_subsystem *s: nvme_subsystem_t object
__u32 nsid: Namespace id

Return

nvme_ns_t of the namespace with id nsid in subsystem s

char *nvme_get_path_attr(nvme_path_t p, const char *attr)¶: Read path sysfs attribute

Parameters

nvme_path_t p: nvme_path_t object
const char *attr: sysfs attribute name

Return

String with the contents of attr or NULL in case of an empty value: or in case of an error (indicated by non-zero errno code).

nvme_ns_t nvme_scan_namespace(const char *name)¶: scan namespace based on sysfs name

Parameters

const char *name: sysfs name of the namespace to scan

Return

nvme_ns_t object or NULL if not found.

const char *nvme_host_get_hostsymname(nvme_host_t h)¶: Get the host’s symbolic name

Parameters

nvme_host_t h: Host for which the symbolic name should be returned.

Return

The symbolic name or NULL if a symbolic name hasn’t been configure.

void nvme_host_set_hostsymname(nvme_host_t h, const char *hostsymname)¶: Set the host’s symbolic name

Parameters

nvme_host_t h: Host for which the symbolic name should be set.
const char *hostsymname: Symbolic name

filters.h

libnvme directory filter

int nvme_namespace_filter(const struct dirent *d)¶: Filter for namespaces

Parameters

const struct dirent *d: dirent to check

Return

1 if d matches, 0 otherwise

int nvme_paths_filter(const struct dirent *d)¶: Filter for paths

Parameters

const struct dirent *d: dirent to check

Return

1 if d matches, 0 otherwise

int nvme_ctrls_filter(const struct dirent *d)¶: Filter for controllers

Parameters

const struct dirent *d: dirent to check

Return

1 if d matches, 0 otherwise

int nvme_subsys_filter(const struct dirent *d)¶: Filter for subsystems

Parameters

const struct dirent *d: dirent to check

Return

1 if d matches, 0 otherwise

int nvme_scan_subsystems(struct dirent ***subsys)¶: Scan for subsystems

Parameters

struct dirent ***subsys: Pointer to array of dirents

Return

number of entries in subsys

int nvme_scan_subsystem_namespaces(nvme_subsystem_t s, struct dirent ***ns)¶: Scan for namespaces in a subsystem

Parameters

nvme_subsystem_t s: Subsystem to scan
struct dirent ***ns: Pointer to array of dirents

Return

number of entries in ns

int nvme_scan_ctrls(struct dirent ***ctrls)¶: Scan for controllers

Parameters

struct dirent ***ctrls: Pointer to array of dirents

Return

number of entries in ctrls

int nvme_scan_ctrl_namespace_paths(nvme_ctrl_t c, struct dirent ***paths)¶: Scan for namespace paths in a controller

Parameters

nvme_ctrl_t c: Controller to scan
struct dirent ***paths: Pointer to array of dirents

Return

number of entries in paths

int nvme_scan_ctrl_namespaces(nvme_ctrl_t c, struct dirent ***ns)¶: Scan for namespaces in a controller

Parameters

nvme_ctrl_t c: Controller to scan
struct dirent ***ns: Pointer to array of dirents

Return

number of entries in ns

util.h

libnvme utility functions

enum nvme_connect_err¶: nvme connect error codes

Constants

ENVME_CONNECT_RESOLVE: failed to resolve host
ENVME_CONNECT_ADDRFAM: unrecognized address family
ENVME_CONNECT_TRADDR: failed to get traddr
ENVME_CONNECT_TARG: need a transport (-t) argument
ENVME_CONNECT_AARG: need a address (-a) argument
ENVME_CONNECT_OPEN: failed to open nvme-fabrics device
ENVME_CONNECT_WRITE: failed to write to nvme-fabrics device
ENVME_CONNECT_READ: failed to read from nvme-fabrics device
ENVME_CONNECT_PARSE: failed to parse ctrl info
ENVME_CONNECT_INVAL_TR: invalid transport type
ENVME_CONNECT_LOOKUP_SUBSYS_NAME: failed to lookup subsystem name
ENVME_CONNECT_LOOKUP_SUBSYS: failed to lookup subsystem
ENVME_CONNECT_ALREADY: the connect attempt failed, already connected
ENVME_CONNECT_INVAL: invalid arguments/configuration
ENVME_CONNECT_ADDRINUSE: hostnqn already in use
ENVME_CONNECT_NODEV: invalid interface
ENVME_CONNECT_OPNOTSUPP: not supported

__u8 nvme_status_to_errno(int status, bool fabrics)¶: Converts nvme return status to errno

Parameters

int status: Return status from an nvme passthrough command
bool fabrics: Set to true if status is to a fabrics target.

Return

An errno representing the nvme status if it is an nvme status field, or unchanged status is < 0 since errno is already set.

const char *nvme_status_to_string(int status, bool fabrics)¶: Returns string describing nvme return status.

Parameters

int status: Return status from an nvme passthrough command
bool fabrics: Set to true if status is to a fabrics target.

Return

String representation of the nvme status if it is an nvme status field, or a standard errno string if status is < 0.

const char *nvme_errno_to_string(int err)¶: Returns string describing nvme connect failures

Parameters

int err: Returned error code from nvme_add_ctrl()

Return

String representation of the nvme connect error codes

void nvme_init_ctrl_list(struct nvme_ctrl_list *cntlist, __u16 num_ctrls, __u16 *ctrlist)¶: Initialize an nvme_ctrl_list structure from an array.

Parameters

struct nvme_ctrl_list *cntlist: The controller list structure to initialize
__u16 num_ctrls: The number of controllers in the array, ctrlist.
__u16 *ctrlist: An array of controller identifiers in CPU native endian.

Description

This is intended to be used with any command that takes a controller list argument. See nvme_ns_attach_ctrls() and nvme_ns_detach().

void nvme_init_dsm_range(struct nvme_dsm_range *dsm, __u32 *ctx_attrs, __u32 *llbas, __u64 *slbas, __u16 nr_ranges)¶: Constructs a data set range structure

Parameters

struct nvme_dsm_range *dsm: DSM range array
__u32 *ctx_attrs: Array of context attributes
__u32 *llbas: Array of length in logical blocks
__u64 *slbas: Array of starting logical blocks
__u16 nr_ranges: The size of the dsm arrays

Description

Each array must be the same size of size ‘nr_ranges’. This is intended to be used with constructing a payload for nvme_dsm().

Return

The nvme command status if a response was received or -errno otherwise.

void nvme_init_copy_range(struct nvme_copy_range *copy, __u16 *nlbs, __u64 *slbas, __u32 *eilbrts, __u32 *elbatms, __u32 *elbats, __u16 nr)¶: Constructs a copy range structure

Parameters

struct nvme_copy_range *copy: Copy range array
__u16 *nlbs: Number of logical blocks
__u64 *slbas: Starting LBA
__u32 *eilbrts: Expected initial logical block reference tag
__u32 *elbatms: Expected logical block application tag mask
__u32 *elbats: Expected logical block application tag
__u16 nr: Number of descriptors to construct

void nvme_init_copy_range_f1(struct nvme_copy_range_f1 *copy, __u16 *nlbs, __u64 *slbas, __u64 *eilbrts, __u32 *elbatms, __u32 *elbats, __u16 nr)¶: Constructs a copy range f1 structure

Parameters

struct nvme_copy_range_f1 *copy: Copy range array
__u16 *nlbs: Number of logical blocks
__u64 *slbas: Starting LBA
__u64 *eilbrts: Expected initial logical block reference tag
__u32 *elbatms: Expected logical block application tag mask
__u32 *elbats: Expected logical block application tag
__u16 nr: Number of descriptors to construct

int nvme_get_feature_length(int fid, __u32 cdw11, __u32 *len)¶: Retreive the command payload length for a specific feature identifier

Parameters

int fid: Feature identifier, see enum nvme_features_id.
__u32 cdw11: The cdw11 value may affect the transfer (only known fid is NVME_FEAT_FID_HOST_ID)
__u32 *len: On success, set to this features payload length in bytes.

Return

0 on success, -1 with errno set to EINVAL if the function did not recognize fid.

int nvme_get_feature_length2(int fid, __u32 cdw11, enum nvme_data_tfr dir, __u32 *len)¶: Retreive the command payload length for a specific feature identifier

Parameters

int fid: Feature identifier, see enum nvme_features_id.
__u32 cdw11: The cdw11 value may affect the transfer (only known fid is NVME_FEAT_FID_HOST_ID)
enum nvme_data_tfr dir: Data transfer direction: false - host to controller, true - controller to host may affect the transfer (only known fid is NVME_FEAT_FID_HOST_MEM_BUF).
__u32 *len: On success, set to this features payload length in bytes.

Return

0 on success, -1 with errno set to EINVAL if the function did not recognize fid.

int nvme_get_directive_receive_length(enum nvme_directive_dtype dtype, enum nvme_directive_receive_doper doper, __u32 *len)¶: Get directive receive length

Parameters

enum nvme_directive_dtype dtype: Directive type, see enum nvme_directive_dtype
enum nvme_directive_receive_doper doper: Directive receive operation, see enum nvme_directive_receive_doper
__u32 *len: On success, set to this directives payload length in bytes.

Return

0 on success, -1 with errno set to EINVAL if the function did not recognize dtype or doper.

size_t get_entity_name(char *buffer, size_t bufsz)¶: Get Entity Name (ENAME).

Parameters

char *buffer: The buffer where the ENAME will be saved as an ASCII string.
size_t bufsz: The size of buffer.

Description

Per TP8010, ENAME is defined as the name associated with the host (i.e. hostname).

Return

Number of characters copied to buffer.

size_t get_entity_version(char *buffer, size_t bufsz)¶: Get Entity Version (EVER).

Parameters

char *buffer: The buffer where the EVER will be saved as an ASCII string.
size_t bufsz: The size of buffer.

Description

EVER is defined as the operating system name and version as an ASCII string. This function reads different files from the file system and builds a string as follows: [os type] [os release] [distro release]

E.g. “Linux 5.17.0-rc1 SLES 15.4”

Return

Number of characters copied to buffer.

char *kv_strip(char *kv)¶: Strip blanks from key value string

Parameters

char *kv: The key-value string to strip

Description

Strip leading/trailing blanks as well as trailing comments from the Key=Value string pointed to by kv.

Return

A pointer to the stripped string. Note that the original string, kv, gets modified.

char *kv_keymatch(const char *kv, const char *key)¶: Look for key in key value string

Parameters

const char *kv: The key=value string to search for the presence of key
const char *key: The key to look for

Description

Look for key in the Key=Value pair pointed to by k and return a pointer to the Value if key is found.

Check if kv starts with key. If it does then make sure that we have a whole-word match on the key, and if we do, return a pointer to the first character of value (i.e. skip leading spaces, tabs, and equal sign)

Return

A pointer to the first character of “value” if a match is found. NULL otherwise.

char *startswith(const char *s, const char *prefix)¶: Checks that a string starts with a given prefix.

Parameters

const char *s: The string to check
const char *prefix: A string that s could be starting with

Return

If s starts with prefix, then return a pointer within s at the first character after the matched prefix. NULL otherwise.

round_up¶

round_up (val, mult)

Round a value val to the next multiple specified by mult.

Parameters

val: Value to round
mult: Multiple to round to.

Description

usage: int x = round_up(13, sizeof(__u32)); // 13 -> 16

__u16 nvmf_exat_len(size_t val_len)¶: Return length rounded up by 4

Parameters

size_t val_len: Value lenght

Description

Return the size in bytes, rounded to a multiple of 4 (e.g., size of __u32), of the buffer needed to hold the exat value of size val_len.

Return

Lenght rounded up by 4

__u16 nvmf_exat_size(size_t val_len)¶: Return min aligned size to hold value

Parameters

size_t val_len: This is the length of the data to be copied to the “exatval” field of a “struct nvmf_ext_attr”.

Description

Return the size of the “struct nvmf_ext_attr” needed to hold a value of size val_len.

Return

The size in bytes, rounded to a multiple of 4 (i.e. size of __u32), of the “struct nvmf_ext_attr” required to hold a string of length val_len.

struct nvmf_ext_attr *nvmf_exat_ptr_next(struct nvmf_ext_attr *p)¶: Increment p to the next element in the array.

Parameters

struct nvmf_ext_attr *p: Pointer to an element of an array of “struct nvmf_ext_attr”.

Description

Extended attributes are saved to an array of “struct nvmf_ext_attr” where each element of the array is of variable size. In order to move to the next element in the array one must increment the pointer to the current element (p) by the size of the current element.

Return

Pointer to the next element in the array.

enum nvme_version¶: Selector for version to be returned by nvme_get_version

Constants

NVME_VERSION_PROJECT: Project release version
NVME_VERSION_GIT: Git reference

const char *nvme_get_version(enum nvme_version type)¶: Return version libnvme string

Parameters

enum nvme_version type: Selects which version type (see struct nvme_version)

Return

Returns version string for known types or else “n/a”

int nvme_uuid_to_string(unsigned char uuid[NVME_UUID_LEN], char *str)¶: Return string represenation of encoded UUID

Parameters

unsigned char uuid[NVME_UUID_LEN]: Binary encoded input UUID
char *str: Output string represenation of UUID

Return

Returns error code if type conversion fails.

int nvme_uuid_from_string(const char *str, unsigned char uuid[NVME_UUID_LEN])¶: Return encoded UUID represenation of string UUID

Parameters

const char *str: Output string represenation of UUID
unsigned char uuid[NVME_UUID_LEN]: Binary encoded input UUID

Return

Returns error code if type conversion fails.

int nvme_uuid_random(unsigned char uuid[NVME_UUID_LEN])¶: Generate random UUID

Parameters

unsigned char uuid[NVME_UUID_LEN]: Generated random UUID

Description

Generate random number according https://www.rfc-editor.org/rfc/rfc4122#section-4.4

Return

Returns error code if generating of random number fails.

log.h

logging functions

void nvme_init_logging(nvme_root_t r, int lvl, bool log_pid, bool log_tstamp)¶: Initialize logging

Parameters

nvme_root_t r: nvme_root_t context
int lvl: Logging level to set
bool log_pid: Boolean to enable logging of the PID
bool log_tstamp: Boolean to enable logging of the timestamp

Description

Sets the default logging variables for the library.

API¶

libnvme

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