nvme_get_feature_length - Man Page

int nvme_get_feature_length (int fid , __u32 cdw11 , __u32 *len );

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)

len

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

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