libnvme(9)                        API Manual                        libnvme(9)

NAME
       struct nbft_ssns_ext_info - Subsystem and Namespace Extended
       Information Descriptor (Figure 21)

SYNOPSIS
       struct nbft_ssns_ext_info {
           __u8 structure_id;
           __u8 version;
           __le16 ssns_index;
           __le32 flags;
           __le16 cntlid;
           __le16 asqsz;
           struct nbft_heap_obj dhcp_root_path_str_obj;
           __u8 naed;
           __u8 cipeec;
           __le16 cto;
           __u8 nceec;
        };


Members
       structure_id
                   Structure ID: This field shall be set to 9h (i.e., SSNS
                   Extended Info; #NBFT_DESC_SSNS_EXT_INFO).

       version     Version: This field shall be set to 1h.

       ssns_index  SSNS Descriptor Index: This field indicates the value of
                   the SSNS Descriptor Index field of the Subsystem and
                   Namespace Descriptor (see struct nbft_ssns) whose SSNS
                   Extended Information Descriptor Heap Object Reference field
                   indicates this descriptor.

       flags       Flags, see enum nbft_ssns_ext_info_flags.

       cntlid      Controller ID: The controller identifier of the first
                   controller associated with the Admin Queue by the driver.
                   If a controller identifier is not administratively
                   specified or direct configuration is not supported by the
                   driver, then this field shall be cleared to 0h.

       asqsz       Admin Submission Queue Size (ASQSZ): The Admin Submission
                   Queue Size utilized for the respective SSNS by the driver.

       dhcp_root_path_str_obj
                   DHCP Root Path String Heap Object Reference: If the SSNS
                   DHCP Root Path Override
                   (#NBFT_SSNS_DHCP_ROOT_PATH_OVERRIDE) flag bit is set to 1h,
                   then this field indicates the offset in bytes of a heap
                   object containing an DHCP Root Path String used by the
                   driver. If the SNSS DHCP Root Path Override flag bit is
                   cleared to 0h, then this field is reserved.

       naed        Namespace Availability Enhanced Diagnostic (since rev.
                   1.1): If the Unavailable Namespace Flag bit is set to 1h
                   (i.e., Unavailable) in the Subsystem Namespace Descriptor,
                   this field may provide additional status codes provided by
                   the pre-OS driver, see enum nbft_ssns_ext_info_naed.

       cipeec      Connect Invalid Parameters Extended Error Codes (since rev,
                   1.1): Connect Invalid Parameters may be returned with
                   additional status details, see enum
                   nbft_ssns_ext_info_cipeec.

       cto         Connection Timeout (since rev. 1.1): Specifies in seconds
                   the timeout value used by the pre-OS driver for connecting
                   to the object specified with this SSNS descriptor. If
                   cleared to 0h, this indicates a timeout of 0 seconds. If
                   set to FFFFh, this indicates that no timeout was specified.

       nceec       Network and Connection Extended Error Codes (since rev,
                   1.1): Error codes specific to network and connectio errors,
                   see enum nbft_ssns_ext_info_nceec.

September 2026             struct nbft_ssns_ext_info                libnvme(9)