[PATCH 1/2] nvmet: handle admin default command set identifier

[Christoph Hellwig]

On Thu, Apr 07, 2022 at 07:39:29PM -0700, Chaitanya Kulkarni wrote:
>  			switch (req->cmd->identify.csi) {
>  			case NVME_CSI_ZNS:
>  				return nvmet_execute_identify_cns_cs_ctrl(req);
> +			case NVME_CSI_NVM:
> +				return nvmet_execute_identify_ctrl(req);

This needs to return the "I/O Command Set Specific Identify Controller data
structure" defined in Figure 102 of the NVM Command specification

>  			default:
>  				break;
>  			}
> +		} else {
> +			switch (req->cmd->identify.csi) {
> +			case NVME_CSI_NVM:
> +				return nvmet_execute_identify_ctrl(req);
> +			}

And we should probably restructure the code like:

		switch (req->cmd->identify.csi) {
		case NVME_CSI_NVM:
			return nvmet_execute_identify_cns_cs_ctrl_nvm(ctrl);
		case NVME_CSI_ZNS:
			if (!IS_ENABLED(CONFIG_BLK_DEV_ZONED))
				break;
			return nvmet_execute_identify_cns_cs_ctrl_zns(ctrl);