---
name: "nvme_identify_ns_csi_user_data_format"
section: "2"
platform: "linux"
package: "libnvme-dev"
version: "1.13-2"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/nvme_identify_ns_csi_user_data_format"
---

# nvme\_identify\_ns\_csi\_user\_data\_format(2)

Identify namespace user data format

## NAME

nvme\_identify\_ns\_csi\_user\_data\_format - Identify namespace user data format

## SYNOPSIS

**int nvme\_identify\_ns\_csi\_user\_data\_format** **(int fd** *,* **\_\_u16 user\_data\_format** *,* **\_\_u8 uuidx** *,* **enum nvme\_csi csi** *,* **void \*data** *);*

## ARGUMENTS

- fd

  File descriptor of nvme device

- user\_data\_format

  Return namespaces capability of identifier

- uuidx

  UUID selection, if supported

- csi

  Command Set Identifier

- 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.