---
name: "libnvme_get_feature_length-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/libnvme_get_feature_length-libnvme3"
---

# libnvme\_get\_feature\_length-libnvme3(2)

Retrieve the command payload length for a specific feature identifier

## NAME

libnvme\_get\_feature\_length - Retrieve the command payload length for a specific feature identifier

## SYNOPSIS

**int libnvme\_get\_feature\_length** **(int fid** *,* **\_\_u32 cdw11** *,* **enum nvme\_data\_tfr dir** *,* **\_\_u32 \*len** *);*

## ARGUMENTS

- fid

  Feature identifier, see *enum nvme\_features\_id*.

- cdw11

  The cdw11 value may affect the transfer (only known fid is NVME\_FEAT\_FID\_HOST\_ID)

- dir

  Data transfer direction: false - host to controller, true - controller to host may affect the transfer (only known fid is NVME\_FEAT\_FID\_HOST\_MEM\_BUF).

- len

  On success, set to this features payload length in bytes.

## RETURN

0 on success, -1 with errno set to EINVAL if the function did not recognize *fid*.