libnvme(9) API Manual libnvme(9)

# [NAME](#NAME)

struct nvme\_associate\_ns\_data - Associate Namespace Data Structure

# [SYNOPSIS](#SYNOPSIS)

struct nvme\_associate\_ns\_data {  
**\_\_u8 pad\[32];**  
**\_\_le32 ensid;**  
**\_\_u8 ensnqn\[256];**  
**\_\_le32 unsid;**  
**\_\_le16 uctrlid;**  
**\_\_u8 unsnqn\[256];**  
**\_\_u8 rsvd554\[22];**  
};

# [Members](#Members)

[pad](#pad)

Padding (PAD), shall be cleared to 0h

[ensid](#ensid)

Exported Namespace ID (ENSID) to associate

[ensnqn](#ensnqn)

Exported NVM Subsystem NQN (ENSNQN). Ignored for a memory-based controller, or if ESUBIDV is set.

[unsid](#unsid)

Underlying Namespace ID (UNSID) to associate with *ensid*

[uctrlid](#uctrlid)

Underlying Controller ID (UCTRLID). Ignored for a memory-based controller.

[unsnqn](#unsnqn)

Underlying NVM Subsystem NQN (UNSNQN). Ignored for a memory-based controller.

[rsvd554](#rsvd554)

Reserved

struct nvme\_associate\_ns\_data October 2026

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Document: nvme_associate_ns_data-libnvme3(2) from nvme-cli 3.2-r0 (Chainguard OS)
Source: https://github.com/linux-nvme/nvme-cli