---
name: "libnbft_subsystem_ns-libnvme3"
section: "2"
platform: "linux"
package: "nvme-cli"
version: "3.2-1"
release: "Arch Linux 2026-11-01"
platforms: ["linux"]
url: "https://new.carta.tech/libnbft_subsystem_ns-libnvme3"
---

# libnbft\_subsystem\_ns-libnvme3(2)

Subsystem Namespace (SSNS) info

## NAME

struct libnbft\_subsystem\_ns - Subsystem Namespace (SSNS) info

## SYNOPSIS

struct libnbft\_subsystem\_ns {\
     **int index;**\
     **struct libnbft\_discovery \*discovery;**\
     **struct libnbft\_security \*security;**\
     **int num\_hfis;**\
     **struct libnbft\_hfi \*\*hfis;**\
     **char transport\[8\];**\
     **char traddr\[40\];**\
     **char \*trsvcid;**\
     **\_\_u16 subsys\_port\_id;**\
     **\_\_u32 nsid;**\
     **enum libnbft\_nid\_type nid\_type;**\
     **\_\_u8 \*nid;**\
     **char \*subsys\_nqn;**\
     **\_\_u16 trflags;**\
     **int controller\_id;**\
     **int asqsz;**\
     **char \*dhcp\_root\_path\_string;**\
     **\_\_u8 naed;**\
     **\_\_u8 cipeec;**\
     **\_\_u16 cto;**\
     **\_\_u8 nceec;**\
     **\_\_u16 flags;**\
 };\

## Members

- index

  SSNS Descriptor Index in the descriptor list.

- discovery

  Primary Discovery Controller associated with this SSNS Descriptor.

- security

  Security Profile Descriptor associated with this namespace.

- num\_hfis

  Number of HFIs.

- hfis

  List of HFIs associated with this namespace. Includes the primary HFI at the first position and all secondary HFIs. This array is null-terminated.

- transport

  Transport Type string (e.g. 'tcp').

- traddr

  Subsystem Transport Address.

- trsvcid

  Subsystem Transport Service Identifier.

- subsys\_port\_id

  The Subsystem Port ID.

- nsid

  The Namespace ID of this descriptor or when *nid* should be used instead.

- nid\_type

  Namespace Identifier Type, see *enum libnbft\_nid\_type*.

- nid

  The Namespace Identifier value.

- subsys\_nqn

  Subsystem and Namespace NQN.

- trflags

  Transport Specific Flags bitmask, see *enum nbft\_ssns\_trflags*.

- controller\_id

  Controller ID (SSNS Extended Information Descriptor): The controller ID associated with the Admin Queue or 0 if not supported.

- asqsz

  Admin Submission Queue Size (SSNS Extended Information Descriptor) or 0 if not supported.

- dhcp\_root\_path\_string

  DHCP Root Path Override string (SSNS Extended Information Descriptor).

- naed

  Namespace Availability Enhanced Diagnostic (SSNS Extended Information Descriptor). Provides additional status codes from the pre-OS driver when the namespace is unavailable. See *enum nbft\_ssns\_ext\_info\_naed* for values. Zero indicates no additional information. Only present in NBFT rev. 1.1+, zero otherwise.

- cipeec

  Connect Invalid Parameters Extended Error Code (SSNS Extended Information Descriptor). Provides additional error detail when the pre-OS driver received a Connect Invalid Parameters status. See *enum nbft\_ssns\_ext\_info\_cipeec* for values. Zero indicates no extended error. Only present in NBFT rev. 1.1+, zero otherwise.

- cto

  Connection Timeout in seconds (SSNS Extended Information Descriptor). The timeout value used by the pre-OS driver for connecting to the object specified with this SSNS descriptor. A value of 0xFFFF indicates that no timeout was specified. Zero indicates either a timeout of zero seconds or that the field is not present (NBFT rev. 1.0).

- nceec

  Network and Connection Extended Error Code (SSNS Extended Information Descriptor). Provides error codes specific to network and connection errors encountered by the pre-OS driver. See *enum nbft\_ssns\_ext\_info\_nceec* for values. Zero indicates no extended error. Only present in NBFT rev. 1.1+, zero otherwise.

- flags

  SSNS Flags bitmask, see *enum nbft\_ssns\_flags*.