struct nbft_control - NBFT Table - Control Descriptor (Figure 8)

structure_id Structure ID: This field specifies the element (refer to enumnbft_desc_type). This field shall be set to 1h (i.e., Control, #NBFT_DESC_CONTROL). major_revision Major Revision: The major revision of the structure corresponding to the Signature field. Larger major revision numbers should not be assumed backward compatible to lower major revision numbers with the same signature. minor_revision Minor Revision: The minor revision of the structure corresponding to the signature field. If the major revision numbers are the same, any minor revision number differences shall be backwards compatible with the same signature. reserved1 Reserved. csl Control Structure Length (CSL): This field indicates the length in bytes of the Control Descriptor. flags Flags, see enumnbft_control_flags. reserved2 Reserved. hdesc Host Descriptor (HDESC): This field indicates the location and length of the Host Descriptor (see structnbft_host). hsv Host Descriptor Version (HSV): This field indicates the version of the Host Descriptor. reserved3 Reserved. hfio HFI Descriptor List Offset (HFIO): If this field is set to a non-zero value, then this field indicates the offset in bytes of the HFI Descriptor List, if any, from byte offset 0h of the NBFT Table Header. If the num_hfi field is cleared to 0h, then this field is reserved. hfil HFI Descriptor Length (HFIL): This field indicates the length in bytes of each HFI Descriptor, if any. If the num_hfi field is cleared to 0h, then this field is reserved. hfiv HFI Descriptor Version (HFIV): This field indicates the version of each HFI Descriptor. num_hfi Number of Host Fabric Interface Descriptors (NumHFI): This field indicates the number of HFI Descriptors (see structnbft_hfi) in the HFI Descriptor List, if any. If no interfaces have been configured, then this field shall be cleared to 0h. ssnso SSNS Descriptor List Offset (SSNSO):: This field indicates the offset in bytes of the SSNS Descriptor List, if any, from byte offset 0h of the NBFT Table Header. If the num_ssns field is cleared to 0h, then this field is reserved. ssnsl SSNS Descriptor Length (SSNSL): This field indicates the length in bytes of each SSNS Descriptor, if any. If the num_ssns field is cleared to 0h, then this field is reserved. ssnsv SSNS Descriptor Version (SSNSV): This field indicates the version of the SSNS Descriptor. num_ssns Number of Subsystem and Namespace Descriptors (NumSSNS): This field indicates the number of Subsystem Namespace (SSNS) Descriptors (see structnbft_ssns) in the SSNS Descriptor List, if any. seco Security Profile Descriptor List Offset (SECO): This field indicates the offset in bytes of the Security Profile Descriptor List, if any, from byte offset 0h of the NBFT Table Header. If the num_sec field is cleared to 0h, then this field is reserved. secl Security Profile Descriptor Length (SECL): This field indicates the length in bytes of each Security Profile Descriptor, if any. If the num_sec field is cleared to 0h, then this field is reserved. secv Security Profile Descriptor Version (SECV): This field indicates the version of the Security Profile Descriptor. num_sec Number of Security Profile Descriptors (NumSec): This field indicates the number of Security Profile Descriptors (see structnbft_security), if any, in the Security Profile Descriptor List. disco Discovery Descriptor Offset (DISCO): This field indicates the offset in bytes of the Discovery Descriptor List, if any, from byte offset 0h of the NBFT Table Header. If the num_disc field is cleared to 0h, then this field is reserved. discl Discovery Descriptor Length (DISCL): This field indicates the length in bytes of each Discovery Descriptor, if any. If the num_disc field is cleared to 0h, then this field is reserved. discv Discovery Descriptor Version (DISCV): This field indicates the version of the Discovery Descriptor. num_disc Number of Discovery Descriptors (NumDisc): This field indicates the number of Discovery Descriptors (see structnbft_discovery), if any, in the Discovery Descriptor List, if any. reserved4 Reserved. August 2025 struct nbft_control libnvme(2)

struct nbft_control - NBFT Table - Control Descriptor (Figure 8)

struct nbft_control { __u8structure_id;__u8major_revision;__u8minor_revision;__u8reserved1;__le16csl;__u8flags;__u8reserved2;structnbft_heap_objhdesc;__u8hsv;__u8reserved3;__le32hfio;__le16hfil;__u8hfiv;__u8num_hfi;__le32ssnso;__le16ssnsl;__u8ssnsv;__u8num_ssns;__le32seco;__le16secl;__u8secv;__u8num_sec;__le32disco;__le16discl;__u8discv;__u8num_disc;__u8reserved4[16]; };